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Question 62832: In January in a certain city the unconditional probability of rain on any given day of the month is 0.400. But the probability of rain on a day that follows a rainy day is 0.600 and the probability of rain on a day following a nonrainy day is 0.250. Find the probability that January 1st and January 2nd are rainy and that January 3rd and 4th are not rainy given that December 31st was clear all day.
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Question 62823: How could nonparametric data be transformed into parametric data that could be used in an ANOVA? How do the fe and fo in a nonparametric test correspond to the SSE and the SSA in an ANOVA?
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Question 63255: Data obtained from a test of Nicorette gum a chewing gum to help smokers
If two different subjects are randomly sedected, without replacement find the probability that they are both from the placebo group.
mouth or throat soreness Nicorette (41) placebo (35)
no mouth or throat soreness Nicorette (109) placebo (118)
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Question 63314: Major help needed in figuring this one out? Respectfully thank you for your help!

What is the difference between an independent and a dependent variable? Can independent and dependent variables be interchangeable? Why or why not? Provide an example of this use.

For example, cost accountant Linda Thomas provided the following sampling data for observations obtained during an investigation of the relationship between the volume of an ingredient X and the weight of a production batch Y.

Volume X. Weight Y

10 61

24 110

13 75

7 47

9 78

25 102

6 38

10 42

16 75

15 91

Note: When submitting this question the columns all come together. There are two columns going down but they don't seem to line up when submitting the question.

1) determine the estimated regression equation
2) compute, for batch weight, (a) the sample standard deviation and (b) the standard error of the estimate. Does a comparison of these two values indicate that the regression line would be useful in predicting batch weight? Why or why not?

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Question 63356: For the functions f(x) = 8x2 - 6
and g(x) = -2x2 + 2,
find g(f((-3)). (Do NOT put commas in large numbers.)
For the functions f(x) = 4x + 7 and g(x) = -9x + 11,
find f(g(0)).
For the functions f(x) = 7x2 - 1
and g(x) = -4x2 + 7,
find f(g(-3)). (Do NOT put commas in large numbers.)
For the functions f(x) = 9x + 8 and g(x) = -11x + 9,
find g(f((-4)).
For the functions f(x) = 10x + 11 and g(x) = -5x + 6,
find f(g(-1)).

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Question 63330: Thank your for your continued guidence and help in my pursuit of understanding statistics. Your help is greatly appreciated!
1. The manager of a computer software company wishes to study the number of hours senior executives spend at their desktop computers by type of industry. The manager selected a sample of five executives from each of three industries. At the .05 significance level, can she conclude there is a difference in the mean number of hours spent per week by industry?
Banking Retail Insurance
12 8 10

10 8 8

10 6 6

12 8 8

10 10 10
Note: When submitting all numbers are bunched together but follow underneath each category of Banking, Retail and Insurance.
2. Given the following sample information, test the hypothesis that the treatment means are equal at the .05 significance level.
Treatment 1 Treatment 2 Treatment 3
8 3 3

11 2 4

10 1 5

3 4
2
Note: When submitting all number are bunched together but the firt three columns should go under Treat 1, Treat 2, Treat 3. Columnes 4 should have 3 under Treat 2 and 4 under Treat 3. Column 5 should have 2 under Treat 2.
a.State the null hypothesis and the alternate hypothesis.
b.What is the decision rule?
c.Compute SST, SSE, and SS total.
d.Complete an ANOVA table.
e.State your decision regarding the null hypothesis.

3. The chief of security for the Mall of the Dakotas was directed to study the problem of missing goods. He selected a sample of 100 boxes that had been tampered with and ascertained that for 60 of the boxes the missing pants, shoes, and so on were attributed to shoplifting. For 30 other boxes employees had stolen the goods, and for the remaining 10 boxes he blamed poor inventory control. In his report to the mall management, can he say that shoplifting is twice as likely to be the cause of the loss as compared with either employee theft or poor inventory control and that employee theft and poor inventory control are equally likely? Use the .02 significance level.
4. In a particular market there are three commercial television stations, each with its own evening news program from 6:00 to 6:30 P.M.According to a report in this morning's local newspaper, a random sample of 150 viewers last night revealed 53 watched the news on WNAE (channel 5), 64 watched on WRRN (channel 11), and 33 on WSPD (channel 13). At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?

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Question 61163: An advertising executive receives an average of 10 telephone calls each afternoon between 2 and 4 P.M. The calls occur randomly and independently of one another and follow a Poisson model.
a) Find the probability that the executive will receive 13 calls between 2 and 4 P.M. on a particular afternoon.
b) Find the probability that the executive will receive seven calls between 2 and 3 P.M. on a particular afternoon.
c) Find the probability that the executive will receive at least five calls between 2 and 4 P.M. on a particular afternoon.
d) Find the probability that the executive will receive three or less calls between 2 and 3 P.M. on a particular afternoon.
e) Find the probability that the executive will receive eight or more calls between 2 and 4 P.M. on a particular afternoon.
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Question 60878: can u please help me in this
let E(x^r) = 1/r+1 , r=1,2,3,� find the series representation for the moment generating function of x , sum this series
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Question 60877: can u please help me in this
find the mean and variance if they exist , of each of the following distribution
f(x) = 3 factorial/xfactorial(3-x)factorial * (1/2)^3 , x = 0,1,2,3 zero else where

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Question 60612: please help me in this
let f(X) =2x 0 a) compute E(1/x)
b) find distribution function and the p.d.f of Y=1/X
c) compute E(y) and compare this result with the answer obtained in part a

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Question 60610: please help me in this
let x have the p.d.f f(x)=3x^2 , 0
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Question 60607: please help me in this
let x have the p.d.f f(x)= (x+2)/18 , -2 find E[(x+2)^3], and E[6x-2(x+2)^3]
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Question 60605: please help me in this
p(c1 intersect c2 intersect c3 intersect c4 )= p(c1)p(c2|c1)p(c3|c1 intersect c2)p(c4|c1intersect c2 intersect c3)
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Question 60602: i need help in this

if x is arandom variable such that
E(x) = 3 and E(x^2)=13 ,
use techybeshev�s inequality to determine
alower bound for the probability p(-2
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Question 60599: i need help in this

let E(x^r) = 1/r+1 , r=1,2,3,� find the series representation for the moment generating function of x , sum this series
let E(x^r) = 1/r+1 , r=1,2,3,� find the series representation for the moment generating function of x , sum this series
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Question 60217: Several students are unprepared for a true/false test with 50 questions, and all of their answers are guesses. Find the mean, variance and standard deviation for the number of correct answers for such students. For mean and variance give 1 decimal place of precision, for standard deviation give 2. give the values, separated by commas, with 1 blank character between a comma and subsequent value.
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Question 60597: i want your help please :
find the mean and variance if they exist , of each of the following distribution
f(x) = 3!/x!(3-x)!*(1/2)^3 , x = 0,1,2,3 zero else where

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Question 60416: please i need your help
abowl contain 10 chips, of which 8 are marked $ 2 each and 2 are marke $5 each, let aperson choose at random and without replcement , 3 chips from this bowl, if the person is to receive the sum of the resulting amount
find his expectation

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Question 60412: Statistics are like speaking or reading a foreign language unlike any other. Thank you for your patience and support.
1. In hypothesis testing why are verbal problem statements converted to numerical problem statements?
2. Why is it important to identify the parameter when converting a problem statement from the verbal numerical?
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Question 60220: A statistics professor finds that when she schedules an office hour for student help, an average of two students arrive. fidn the probability that in a randomly selected office hour, the number of student arrivals is five. give the answer as a decimal value with 4 places of precision, and no leading 0.
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Question 60050: Can somebody explain how should I deal with this? I pulled about a handful of hair and I still don't know what to do.
The skid properties of a snow tire have been tested and a mean skid distance of 154 feet has been established for standardized conditions. A new more , expensive tire is developed, but test on a sample of 17 new tires will be purchased only if it can be shown(at the 0.05 sifnificance level) that they skid less than the current tires.Based on the sample, will the new tires be purchased? Indicate whether you would use a z score or t score, give the value of that score and the critical value to 2 decimal places, and state whether you "Reject" or "Fail to reject the null hyphotesis.

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Question 60219: A statistics professor finds that when she schedules an office hour for student help, an average of two students arrive. fidn the probability that in a randomly selected office hour, the number of student arrivals is five. give the answer as a decimal value with 4 places of precision, and no leading 0.
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Question 60215: The Newman Constuction Comapany bids on a job to constuct a building>. If the bid is won, there is a 0.7 proability of making a $175,000 profit and there is a probability of 0.3 that the contractor will break even. what is the expected value? Use standard (u.s.) monetary format, with no blank between the $ sign and the value.
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Question 60214: the Kwik Klean Car Wash loses $30 on rainy days and gains $120 on days when it does not rain. If the probability of rain is 0.15, what is the expected value of net profit? Use standard (U.S.) monetary format, with no blank between the $ sign and the value.
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Question 60197: please help me in this
if x has the variance sigma^2 , then var[ax+b]=a^2 var(X)=a^2 sigma^2
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Question 60196: please help me in this
if the pdf of the contiuos random variable is given by
f(x) = 630 x^4(1-x)^4 0 0 otherwise

find the probability that x will take on avalue within 2 standard diviation of the mean and compare it with lower bound provided by tchebyshev's theorom
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Question 60016: Dear Sir, Madam,
Please can you help me with the following?
Laura wanted to build a multiple regression model based on advertising expenditures and CoffeeTime�s� price index. Based on the selection of all normal values, she obtained the following:
1) Multiple R = 0.738
2) R-square = 0.546
By using lagged values she came up with the following:
1) Multiple R = 0.755
2) R-square = 0.570
Explain the differences in using these different models. How could CoffeeTime� further optimize this model?
I do not need to make a calculation but I need to come up with arguments to explain the differences.
Please can you shed your light on my problem?
Thanks very much,
Claudia Patricia Cardenas

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Question 60015: The recent average starting salary for new college graduates in computer information systems is $47,500. Assume salaries are normally distributed with a standard deviation of $4,500.
a)What is the probability of a new graduate receiving a salary between $45,000 and $50,000?

b)What is the probability of a new graduate getting a starting salary in excess of $55,000?

c)What percent of starting salaries is no more than $42,250?

d)What is the cutoff for the bottom 5% of the salaries?

e)What is the cutoff for the top 3% of the salaries?

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Question 59691: please i need your help
cast adie anumber of independent times until six appears on the up side of the die
1. find the pdf of x, the number of casts needed to obtain that first six,
2. show that the summation from 1 to inf for f(x)=1
3. determine p(x=1,3,5,7....)
3. find the distribution function F(x) =p(X
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Question 59216: If c1 and c2 are independent events , show that the following pairs of events are also independent
1. c1 complement and c2
2. c1 complement and c2 complement

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Question 58616: 9 houses are built on a circular road. Each house is painted red, white, or blue with a probability 1/3 for each color. What is the probability that no two adjacent houses are the same color.
Is this simply 2/3 since the probability of any adjacent house not being the same color is 2 out of 3??? Seems too simple.
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Question 54244: Hi,
I desperately need help with a probability and statistics problems.
Q) How many paths can a rook move from the lower left corner of a chessboard to the diagonally opposite corner by moving only up or the right at each step?
Here is what I have for the answer, but not sure:
(2n ) or (14 )
( n ) ( 7 )
Thank you very much for those like to help.
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Question 52867: solve the equation if possible
15/x-4=6/x+3
thanks a lot
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Question 52866: solve the equation if possible:
100-4u/3=5u+6/4 +6
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Question 51963: find the first five terms of the sequence in which a1=4 and an+1=3an+5, n is grater than or equal to 1.
i hope you can help
thanks a bunch!
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Question 51962: solve triangle ABC given that a=13 b=14 and c=11. round to the nearest tenth.
i hope you can help
thanks a bunch!
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Question 51961: given triangle ABC with a=10 A=13 and B=26 what is the lenght of c?
i hope you can help
thanks a bunch!
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Question 51960: a ramp in a multistory car park is 62 feet long and rises 11 feet. etimate the angle that the ramp makes with the horizontal.
thanks a bunch
i hope you can help
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Question 51765: which angle is not coterminal with -720degrees?
a.-1260 degrees b. -1440 degrees c.-1080 degrees d.-360 degrees
thanks!
aloha!
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Question 63652: Hello, I'm Alex. Could I please ask your assistance on this Homeschool American School Problems because I don't have a teacher here to help?
Suppose there are 10 items on a true-false test. The person taking the test does not read the questions; he just answers them randomly. What is the probability of his guessing all answers correctly?

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Question 63646: What constitutes a small sample size in a test of two populations?
When testing two populations with small sample sizes, do both sample sizes have to be identical? Why or why not?

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Question 63779: Kindly assist.
A game of chance consist of tossing 3 coins one . For every head that shows up one gain $ 300 and $ losses $ 200 for each tail that appears .
a) Determine the expected value of the game
b) Dtermin the Standard deviation of the game
c) It is prudent for one to play the game ?
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Question 63964: Find the probability of the following card hands from a 52-card deck. In poker, aces are either high or low. A bridge hand is made up of 13 cards. In bridge, 4 aces
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Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305, 1306..1350, 1351..1395, 1396..1440, 1441..1485, 1486..1530, 1531..1575, 1576..1620, 1621..1665, 1666..1710, 1711..1755, 1756..1800, 1801..1845, 1846..1890, 1891..1935, 1936..1980, 1981..2025, 2026..2070, 2071..2115, 2116..2160, 2161..2205, 2206..2250, 2251..2295, 2296..2340, 2341..2385, 2386..2430, 2431..2475, 2476..2520, 2521..2565, 2566..2610, 2611..2655, 2656..2700, 2701..2745, 2746..2790, 2791..2835, 2836..2880, 2881..2925, 2926..2970, 2971..3015, 3016..3060, 3061..3105, 3106..3150, 3151..3195, 3196..3240, 3241..3285, 3286..3330, 3331..3375, 3376..3420, 3421..3465, 3466..3510, 3511..3555, 3556..3600, 3601..3645, 3646..3690, 3691..3735, 3736..3780, 3781..3825, 3826..3870, 3871..3915, 3916..3960, 3961..4005, 4006..4050, 4051..4095, 4096..4140, 4141..4185, 4186..4230, 4231..4275, 4276..4320, 4321..4365, 4366..4410, 4411..4455, 4456..4500, 4501..4545, 4546..4590, 4591..4635, 4636..4680, 4681..4725, 4726..4770, 4771..4815, 4816..4860, 4861..4905, 4906..4950, 4951..4995, 4996..5040, 5041..5085, 5086..5130, 5131..5175, 5176..5220, 5221..5265, 5266..5310, 5311..5355, 5356..5400, 5401..5445, 5446..5490, 5491..5535, 5536..5580, 5581..5625, 5626..5670, 5671..5715, 5716..5760, 5761..5805, 5806..5850, 5851..5895, 5896..5940, 5941..5985, 5986..6030, 6031..6075, 6076..6120, 6121..6165, 6166..6210, 6211..6255, 6256..6300, 6301..6345, 6346..6390, 6391..6435, 6436..6480, 6481..6525, 6526..6570, 6571..6615, 6616..6660, 6661..6705, 6706..6750, 6751..6795, 6796..6840, 6841..6885, 6886..6930, 6931..6975, 6976..7020, 7021..7065, 7066..7110, 7111..7155, 7156..7200, 7201..7245, 7246..7290, 7291..7335, 7336..7380, 7381..7425, 7426..7470, 7471..7515, 7516..7560, 7561..7605, 7606..7650, 7651..7695, 7696..7740, 7741..7785, 7786..7830, 7831..7875, 7876..7920, 7921..7965, 7966..8010, 8011..8055, 8056..8100, 8101..8145, 8146..8190, 8191..8235, 8236..8280, 8281..8325, 8326..8370, 8371..8415, 8416..8460, 8461..8505, 8506..8550, 8551..8595, 8596..8640, 8641..8685, 8686..8730, 8731..8775, 8776..8820, 8821..8865, 8866..8910, 8911..8955, 8956..9000, 9001..9045, 9046..9090, 9091..9135, 9136..9180, 9181..9225, 9226..9270, 9271..9315, 9316..9360, 9361..9405, 9406..9450, 9451..9495, 9496..9540, 9541..9585, 9586..9630, 9631..9675, 9676..9720, 9721..9765, 9766..9810, 9811..9855, 9856..9900, 9901..9945, 9946..9990, 9991..10035, 10036..10080, 10081..10125, 10126..10170, 10171..10215, 10216..10260, 10261..10305, 10306..10350, 10351..10395, 10396..10440, 10441..10485, 10486..10530, 10531..10575, 10576..10620, 10621..10665, 10666..10710, 10711..10755, 10756..10800, 10801..10845, 10846..10890, 10891..10935, 10936..10980, 10981..11025, 11026..11070, 11071..11115, 11116..11160, 11161..11205, 11206..11250, 11251..11295, 11296..11340, 11341..11385, 11386..11430, 11431..11475, 11476..11520, 11521..11565, 11566..11610, 11611..11655, 11656..11700, 11701..11745, 11746..11790, 11791..11835, 11836..11880, 11881..11925, 11926..11970, 11971..12015, 12016..12060, 12061..12105, 12106..12150, 12151..12195, 12196..12240, 12241..12285, 12286..12330, 12331..12375, 12376..12420, 12421..12465, 12466..12510, 12511..12555, 12556..12600, 12601..12645, 12646..12690, 12691..12735, 12736..12780, 12781..12825, 12826..12870, 12871..12915, 12916..12960, 12961..13005, 13006..13050, 13051..13095, 13096..13140, 13141..13185, 13186..13230, 13231..13275, 13276..13320, 13321..13365, 13366..13410, 13411..13455, 13456..13500, 13501..13545, 13546..13590, 13591..13635, 13636..13680, 13681..13725, 13726..13770, 13771..13815, 13816..13860, 13861..13905, 13906..13950, 13951..13995, 13996..14040, 14041..14085, 14086..14130, 14131..14175, 14176..14220, 14221..14265, 14266..14310, 14311..14355, 14356..14400, 14401..14445, 14446..14490, 14491..14535, 14536..14580, 14581..14625, 14626..14670, 14671..14715, 14716..14760, 14761..14805, 14806..14850, 14851..14895, 14896..14940, 14941..14985, 14986..15030, 15031..15075, 15076..15120, 15121..15165, 15166..15210, 15211..15255, 15256..15300, 15301..15345, 15346..15390, 15391..15435, 15436..15480, 15481..15525, 15526..15570, 15571..15615, 15616..15660, 15661..15705, 15706..15750, 15751..15795, 15796..15840, 15841..15885, 15886..15930, 15931..15975, 15976..16020, 16021..16065, 16066..16110, 16111..16155, 16156..16200, 16201..16245, 16246..16290, 16291..16335, 16336..16380, 16381..16425, 16426..16470, 16471..16515, 16516..16560, 16561..16605, 16606..16650, 16651..16695, 16696..16740, 16741..16785, 16786..16830, 16831..16875, 16876..16920, 16921..16965, 16966..17010, 17011..17055, 17056..17100, 17101..17145, 17146..17190, 17191..17235, 17236..17280, 17281..17325, 17326..17370, 17371..17415, 17416..17460, 17461..17505, 17506..17550, 17551..17595, 17596..17640, 17641..17685, 17686..17730, 17731..17775, 17776..17820, 17821..17865, 17866..17910, 17911..17955, 17956..18000, 18001..18045, 18046..18090, 18091..18135, 18136..18180, 18181..18225, 18226..18270, 18271..18315, 18316..18360, 18361..18405, 18406..18450, 18451..18495, 18496..18540, 18541..18585, 18586..18630, 18631..18675, 18676..18720, 18721..18765, 18766..18810, 18811..18855, 18856..18900, 18901..18945, 18946..18990, 18991..19035, 19036..19080, 19081..19125, 19126..19170, 19171..19215, 19216..19260, 19261..19305, 19306..19350, 19351..19395, 19396..19440, 19441..19485, 19486..19530, 19531..19575, 19576..19620, 19621..19665, 19666..19710, 19711..19755, 19756..19800, 19801..19845, 19846..19890, 19891..19935, 19936..19980, 19981..20025, 20026..20070, 20071..20115, 20116..20160, 20161..20205, 20206..20250, 20251..20295, 20296..20340, 20341..20385, 20386..20430, 20431..20475, 20476..20520, 20521..20565, 20566..20610, 20611..20655, 20656..20700, 20701..20745, 20746..20790, 20791..20835, 20836..20880, 20881..20925, 20926..20970, 20971..21015, 21016..21060, 21061..21105, 21106..21150, 21151..21195, 21196..21240, 21241..21285, 21286..21330, 21331..21375, 21376..21420, 21421..21465, 21466..21510, 21511..21555, 21556..21600, 21601..21645, 21646..21690, 21691..21735, 21736..21780, 21781..21825, 21826..21870, 21871..21915, 21916..21960, 21961..22005, 22006..22050, 22051..22095, 22096..22140, 22141..22185, 22186..22230, 22231..22275, 22276..22320, 22321..22365, 22366..22410, 22411..22455, 22456..22500, 22501..22545, 22546..22590, 22591..22635, 22636..22680, 22681..22725, 22726..22770, 22771..22815, 22816..22860, 22861..22905, 22906..22950, 22951..22995, 22996..23040, 23041..23085, 23086..23130, 23131..23175, 23176..23220, 23221..23265, 23266..23310, 23311..23355, 23356..23400, 23401..23445, 23446..23490, 23491..23535, 23536..23580, 23581..23625, 23626..23670, 23671..23715, 23716..23760, 23761..23805, 23806..23850, 23851..23895, 23896..23940, 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