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Question 440997: Country "Text Messages" Population
A "66 billion", "1320 million"
B, "28 billion", "88 million"
C, "14 billion", "292 million"
D, "9 billion", "68 million"
Suppose messages are sent randomly to the people in each country. That is, suppose that the 66 billion messages sent in country A had been randomly delivered to the 1.3 billion people in country A. What's the pobability that a person does not get a tsxt message?
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Question 440970: . In a survey of 5100 T.V. viewers, 40% said they watch network news programs. Construct a 95% confidence interval for our estimate of the percentage of T.V. viewers who watch network news programs
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Question 440969: In a poll of 278 registered voters in a certain city, 67% said that they were in favor of a bill which would limit growth and development in their city. Construct a 95% confidence interval for the proportion of voters who are in favor of the bill.

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Question 440900: If 2 cards are chosen from a 52 card deck, what is the probability both are black or both are diamonds?
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Question 441255: Mary has 30 hats. She has 5 green, 7 blue, 12 red, and 6 brown. If she selects two hats at random, what is the probability that both hats are different colors? Round your answer to two decimal places.
Click here to see answer by ewatrrr(10682)

Question 441252: Mary has 14 hats. She has 4 green, 2 blue and 8 red. If she selects two hats what is the probability that both hats are different colors?
Round your answer to two decimal places.
Click here to see answer by ewatrrr(10682)

Question 441243: In a random sample of 15 Americans 18 years old or older, find the probability that exactly 10 have read at least six books within the past year , interpret results
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Question 441291: A sample of 106 golfers showed that their average score on a particular golf course was 87.98 with a standard deviation of 5.39.
Answer each of the following show all work with the final answer to at least two decimal places:
A) Find the 90% confidence interval of the mean score for all 106 golfers.
B) Find the 90% confidence interval of the mean score for all golfers if this is a sample of 130 golfers instead of 106.
C) Which confidence interval is larger and why?
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Question 441315: There is a 90% chance that a pizza place will make a delivery in less than 30 min. what is the probability that in a sample of 10 pizzas ordered from a certain pizza place at different times of the day atleast 7 will be delivered in less than 30 min?
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Question 441321: Four men and three women apply for a job at a company. three of the applicants are chosen for interviews. Let X denote the number of women in the interview pool. find the CDF of X.
this is what i did so far...
there is 35 possibilities,
P(0)= P(chosen 0 women)= (4 C 3) /35 = 4/35
P(1)= P(1 women)
WMM = (4 C 2)(3 C 1)/35 = 6*3 / 35 = 18/35
P(2)= P(2 women)
WWM = (4 C 1)(3 C 2)/35 = 4*3 / 35 = 12/35
P(3)= P(3 women)= WWW=(3 C 3) /35 = 1/35
BUT IM NOT SURE WHAT TO DO NEXT...

Click here to see answer by stanbon(57424)

Question 441282: There are 9 members on a board of directors. If they must form a subcommittee of 5 members, how man different subcommittees are possible?
Click here to see answer by samanthajones(1)

Question 441371: which probality is greater, 13 out of 35 or 21 out of 57
Click here to see answer by jorel1380(2518)

Question 441400: Suppose you are using a=0.05 to test the claim that u=25 using a p-value. sample statistics n=35, x=24.1, and o=2.7 Find the p-value
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Question 441402: Suppose you want to test the claim that u<65.4 Given a sample size of n=35 and a level of significance of a=0.10, when should you reject H O?
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Question 441465: 1.YOU HAVE 52 CARDS,WHAT IS THE PROBABILITY THAT YOUR NOT DEALT A BLACK QUEEN?
2. FIND THE PROBABILITY THAT YOU ARE DEALT AN ACE OR A KING?
Click here to see answer by edjones(7569)

Question 441509: please help me with this equation -9x+1=-80 and can you explain
Click here to see answer by rwm(914)

Question 441589: A game is said to be "fair" if the expected value for winnings is 0, that is, in the long run, the player can expect to win (or lose) $0. Consider the following game. The game costs $1 to play and the winnings are $5 for red, $3 for blue, $2 for yellow and nothing for white. The following probabilities applyl. What are your expected winnings? Does the game favor the player or the owner?
Outcome Probability
Red .02
Blue .04
Yellow .16
White .78
Click here to see answer by stanbon(57424)

Question 441696: Suppose a multiple choice problem has n possible answers. You guess
an answer equally likely at random. If you get it wrong, you pick an
answer equally at random from the remaining choices. You continue
until you have guessed the right answer, each time only guessing from
answers you have not tried yet.
(a) What is the expected number of guesses until you are correct?

Click here to see answer by robertb(4012)

Question 441763: a die is rolled. find the probability of getting a 4 if it is given that the result of the roll was an even number.
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Question 24766: In a group of 30 people, what is the probability that at least 2 people will have the same birthday? Round answer to 2 decimal places.
a)0.07
b)0.29
c)0.71
d)0.93
Click here to see answer by JWG(21)

Question 441795: An unprepared student makes random guesses on all question of her multiple choice test. If there are 16 question and each question has 4 possible answers, what is the probability she will answer at least one question correctly?
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Question 441798: Two dice are rolled. What is the probability the sum of numbers rolled on the dice are less than or equal to 3?
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Question 441797: A small town has 4000 adult males and 6000 adult females. A sociologist conducted a survey and found 40%of the males and 30%of the females drink heavily. An adult is selected at random from the town.
What is the probability that the person drinks heavily?
If the person selected drinks heavily, then what is the probability that the person is a male?
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Question 441793: If you flip a coin 6 times, what is the probability of getting HH TT HT in that order?
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Question 441764: a person selects a card from an ordinary deck of cards. if it is a black card, she wins $2. if it is a red card between 3 and 7 inclusive, she wins $10. If it is a red face card, she wins $25, and if it is a black jack, she wins an additional $100. If it is any other card, she wins nothing. Find the expected value of the game when no money is put up to start the game.
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Question 441810: as part of the graduation paper work , seniors at a particular high school were asked to indicate their post graduation plans. Results show that 15% planned to start college after graduation is this an example of discriptive or inferential?
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Question 441762: how many ways can 5 sopranos and 4 altos be chosen for the university chorus from 7 sopranos and 9 altos?
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Question 441760: A Gallup poll found 78% of americans worry about the quality and healthfulness of their diet. If 5 people are selected at random, find the probablility that all 5 worry about the quality and healthfulness of their diet.
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Question 441751: A survey show that 21% of men consider fishing as their favorite activity. You randomly select men and ask them if fishing is their favorite activity. Find the probability that exactly two of them respond yes?
Would this be .21% *.21= .04

Part b of this question says exactly 3 respond yes? would I just add another .21.
But then question c and d state respectively that at least two respond yes and at most two respond yes? Is this the same thing
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Question 441750: Hello, this is a possible test question and i have no clue how to do this.. and my brain is hurting haha.
A school commitee has one school vice-principal, three student council members and two teachers. How many possible committees could be formed with three vice-principals, eight student council members and eighty teachers?
Thank you!
Click here to see answer by stanbon(57424)

Question 441842: Similar questions to this one were answered but I am not quite sure how to do this homework equation:
An urn contains 3 red and 2 white numbered balls. A sample of 2 balls is randomly chosen.
15. Find the probability that the sample contains a red and a white ball (one digit after decimal point).
16. Find the expected number of white balls in the sample (one digit after decimal point).
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Question 441845: Mr. Doodle's grade distribution over the past 3 years for a course in college algebra is shown in the chart below.
A 45
B 180
C 210
D 95
F 65
I 5
If Jane plans to take a college algebra course with Mr. Doodle, determine the empirical probability that she receives at least a B.
I am having a hard time figuring this one out. Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Click here to see answer by stanbon(57424)

Question 441846: Please show me how to do these probability problems!
An airline estimates that with probability 0.05 a passenger who purchased a ticket won’t take the designated flight. Suppose for a certain flight the airplane can carry 100 passengers and the airline sold 102 tickets.
11. Find the probability that exactly 101 passengers show up to take the flight (4 digits after decimal point).
12. Find the probability that exactly 102 passengers show up to take the flight (4 digits after decimal point).
13. Find the probability that no more than 100 passengers show up to take the flight so the airline doesn’t have to compensate some people and ask them to leave the plane (4 digits after decimal point).
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Question 441869: The starting lineup for a softball team consists of 10 players. How many different batting orders are possible using the starting lineup?
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Question 441918: A report states that 44% of home owners have a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 4 percentage with 92% confidence?
(Please help!! I need to see how to solve this answer. Thanks.)
Click here to see answer by stanbon(57424)

Question 441929: A study of 60 bolts of carpet showed that their average length was 150 yards. The standard deviation of the population is 10 yards. Which of the foloowing is the 99% confidence interval for the mean length per bolt of carpet?
(Please write out so I can learn how to answer this problem.) Thanks!
Click here to see answer by stanbon(57424)

Question 441910: given the amount (oz) of juice in 10 randomly selected juice bottles are:
15.1, 15.6, 15.6, 15.9, 15.2, 15.9, 15.2,15.1, 15.8, 15.2.
construct a 94% confidence interval for the mean amount of the juice, u(with a wierd line), in the population of all such bottles. assume that the population has a normal distribution.
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Question 441923: In a sample of 60 mice, a biologist found that 46% were able to run a maze in 30 seconds or less. Find the 90% limit for the population proportion of mice who can run that maze in 30 seconds or less?
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Question 441876: In a multiple-choice test, each question has four options. students will get 4 points for each correct answer; lose 1 point for each incorrect answer; and receive no points for unanswered questions. A student does not know the correct answer for one question. Is it to her advantage or disadvantage to guess an answer? Show your calculations for expected value. Show your work for full credit.
Please help!!!!!!!!!!!!!!!! I am lost, you guys are the best here and I have learned a lot but stuck on this one.
Click here to see answer by stanbon(57424)

Question 442025: suppose a contestant in a spelling bee has a 93% chance of spelling any given word correctly. what is the probability that he or she spells the first five words in a bee correctly and then misspells the sixth word
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Question 442028: A die is rolled twice. find the probability of two 4's
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Question 442145: Zach sold 2.5 times as much pyrite as Michael.
If together they sold $175 of pyrite, how much did each person sell?
We know the answer (Zach $125, Michael $50) BUT we need to have a detailed explanation of how we achieved the answer??
Sons in 6th grade, Im not much help!
THANKS
Click here to see answer by rwm(914)

Question 442174: Find the mean, variance and standard deviation of the binominal distribution with thte given values, n=124, p=0.72
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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