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Question 631500: A bubble gum machine has 50 gumballs inside. There are 22 red, 14 blue, 9 green and 5 white gumballs. A child choosed one gumball at random,
a. What is the probability that the gumball chosen is white?
b. What is the probability that the gumball chosen is NOT green?
Click here to see answer by ewatrrr(10682)

Question 631571: 1. the table shows claims and their probabilities for an insurance company.
Amount of claim
$0 ----- 0.60
$50,0000 ----- 0.25
$100,000 ----- 0.09
$150,000 ----- 0.04
$200,000 ----- 0.01
$250,000 ----- 0.01
Calculate the expected cost per policy ( expected value).
2. YOU ARE DEALT ONE CARD FROM A 52 CARD DECK. THEN THE CARD IS REPLACED IN THE DECK,THE DECK IS SHUFFLED, AND YOU DRAW AGAIN. FIND THE PROBABILITY OF GETTING A PICTURE CARD THE FIRST TIME AND A CLUB THE SECOND TIME.

Click here to see answer by solver91311(17077)

Question 631662: square of 6 cm,coin of 2cm radius,what is the probility of coin resting independently on 3 different squares(squares are side by side)
Click here to see answer by richard1234(5390)

Question 631788: The heights of adult males in a certain population are normally distributed with a mean of 150cm and a standard deviation of 4cm. Find the probability that a man picked at random from this population has a height greater than 160cm.
Click here to see answer by ewatrrr(10682)

Question 631786: A random variable X has a binomial probability distribution with parameters n and p. The mean value is 3 and the variance is 1.2. Find the values of n and p and hence calculate, correct to three significant figures, P(X<4).
Click here to see answer by reviewermath(604)

Question 631798: what is the answer to 40 f to -28 f?
Click here to see answer by ewatrrr(10682)

Question 631798: what is the answer to 40 f to -28 f?
Click here to see answer by Alan3354(31534)

Question 631829: A Math test has a mean of 53 and standard deviation of 16.0. Find the corresponding z scores for:

I. a test score of 19
II. a test score of 70
Click here to see answer by ewatrrr(10682)

Question 631866: A bookcase is to have four shelves, including the top. The height of the bookcase is to be 2 feet more than the width and only 20 feet of lumber is available. Use an equation to determine the width and height of the bookcase.
Click here to see answer by richwmiller(9144)

Question 631709: the odds against the dispute manager x sitting the wage dispute with the workers are 8:6 and odds in favour of manager ysetting the same dispute is 14:16.
1. what is the chance that neither setting the dispute if both try independently.
2. what is the probability t6hat dispute is settled
Click here to see answer by stanbon(57979)

Question 631878: The number of calls received by a car towing service in an hour has a passion disturbution with parameter 1.64. Find the probability that in a randomly selected hour the number of calls is between 2 and 4 inclusive.
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Question 631819: A company ID card contains 7 digits, such as 92-71-042. How many different ID numbers can be formed?
Click here to see answer by Alan3354(31534)

Question 631953: Assume that the population of heights of male college students is approximately normally distributed with mean m of 69.09 inches and standard deviation s of 4.71 inches. A random sample of 92 heights is obtained. Show all work.
(A) Find
(B) Find the mean and standard error of the distribution
(C) Find
(D) Why is the formula required to solve (A) different than (C)?
Click here to see answer by solver91311(17077)

Question 632073: Hospitals use radioactive substance iodine-131 in their researches.A hospital purchased 40 grams of the substance.Eight days later,when a doctor wanted to use some of the iodine-131,he found out that only 20 grams remained.Predict the amount remaining two weeks after purchase.
Click here to see answer by nerdybill(7009)

Question 632090: If the mean is 76 and the Standard Deviation is 6 how many students scored below a 70 on their test
A. 24.3
B. 15.9
C. 18.4
D. 19.7
Help.(:?
Click here to see answer by ewatrrr(10682)

Question 41634: Tickets are numbered 1 to 50 and placed in a box. Three tickets are drawn at random without replacement. What is the probability that their numbers are all greater than 25?
Click here to see answer by blacksaibot(4)

Question 632166: Rank the following data in increasing order and find the position and value of the 74th percentile. Please show all of your work.

1 7 1 5 4 7 7 3 0 4 0 5
Click here to see answer by stanbon(57979)

Question 632149: The weights of 350,000 ball bearings are normally distributed with a mean of 22.40 ounces and a standard deviation of 0.040 ounces. If 300 random samples of 36 are drawn from the parent population, determine the expected mean and standard deviation of the sampling distribution of the means
Click here to see answer by stanbon(57979)

Question 632205: if 384 individuals are surveyed about their interest in space travel and 43% said they would travel in space given the chance with a margin of error of 5% then the confidence level is
Click here to see answer by stanbon(57979)

Question 632207: Each month, an American household generates an average of 28 pounds of newspaper
for garbage or recyling with a standard deviation of 2 pounds. Assuming a normal
distribution, what percentage of American households generate between 27.8 and 31.3 pounds per month?

Click here to see answer by stanbon(57979)

Question 632206: the z-value for a confidence level of 80% is
Click here to see answer by stanbon(57979)

Question 632203: in a Gallup poll of 1005 individuals, 45% thought they were worse off financially than a year ago. if we want a 95% confidence interval,find the margin of error.
Click here to see answer by stanbon(57979)

Question 632202: suppose a pollster wants a 90% confidence level with a 2% margin of error. How many people should be surveyed?
Click here to see answer by stanbon(57979)

Question 632218: Nine college students had eaten the following number of times at a fast food restaurant for dinner in the last ten days:

7, 8, 10, 4, 9, 2, 8, 3, 9

Find the mean, median, mode, range, and midrange for these data.
Click here to see answer by solver91311(17077)

Question 632229: Can someone please help? I am lost with this....
Assume that the population of heights of male college students is approximately normally distributed with mean m of 72.15 inches and standard deviation s of 6.39 inches. A random sample of 96 heights is obtained.
A) Find
(B) Find the mean and standard error of the distribution
(C) Find
(D) Why is the formula required to solve (A) different than (C)?
Click here to see answer by solver91311(17077)

Question 632270: find the probability of rolling a three first and then a four when a die is rolled twice
Click here to see answer by reviewermath(604)

Question 632275: provide a 95 % confidence interval or p when 88 out of 135 said yes to a survey question
Click here to see answer by reviewermath(604)

Question 632273: what is 65% of 80 please show all work
Click here to see answer by Alan3354(31534)

Question 632306: From past experience, an instructor estimates that the probability that a student will cheat on an exam is .05. The probability that a student cheats and is caught is .01. the probability that a student will be caught, given that the student is cheating, is what?
Click here to see answer by reviewermath(604)

Question 632309: If a college accepts 55% of their applicants, determine the probability that exactly 2 of the next 10 applicants will be accepted.
Click here to see answer by reviewermath(604)

Question 632308: The local baskin robbins receives, on average, .6 complaints from each customer per hour. If the owner's goal is to get less than three complaints per hour, determine the probability (using poisson's equation) that the manager's goal is achieved.
Click here to see answer by reviewermath(604)

Question 632290: iF I have 3 yellow balls, 8 green,5 red and 14 blue,In my bag. What is the probability it will be green or blue?
Click here to see answer by Tatiana_Stebko(1326)

Question 632326: scores on a standardized test are normally distributed with a mean of 550 and standard deviation of 140. convert to a Z-score and use a table to find the following:
the percentage of students who score below 655
the percentage of students who score above 746
Click here to see answer by Theo(3504)

Question 632343: A certain basketball player usually scores on 47% of his shots. If this probability remains constant throughout a game, how likely is he to score on all of his first five shots? On at least four of these five shots? At least P three?
Click here to see answer by stanbon(57979)

Question 632310: If my badminton partner hits kill shots with a normal distributed mean of 90.4, and a standard deviation of 5.3, find the probability that he will really bomb in the next match, hitting with a kill shot lower than a 76.
Click here to see answer by stanbon(57979)

Question 632300: For a class activity, your group has been assigned the task of generating a quiz question that requires use of the formula for conditional probability to compute P(B | A). Your group comes up with the following question: "If P(A and B) = 0.40 and P(A) = 0.20, what is the value of P(B | A)?" What is wrong with this question? Hint: Consider the answer you get when using the correct formula, P(B | A) = P(A and B)/P(A).
Click here to see answer by stanbon(57979)

Question 632369: What topic in statistics does the term "half-life" fall?
Click here to see answer by ewatrrr(10682)

Question 632477: If z is a standard normal variable, find the probability.
The probability that z lies between -0.55 and 0.55'
-0.4176

0.9000

0.4176

-0.9000
Click here to see answer by ewatrrr(10682)

Question 632481: A leasing firm claims that the mean number of miles driven annually, u , in its leased cars is less than 12800 miles. A random sample of 50 cars leased from this firm had a mean of 12499 annual miles driven. It is known that the population standard deviation of the number of miles driven in cars from this firm is 3140 miles. Is there support for the firm's claim at the 0.05 level of significance?
Perform a one-tailed test.
null hypothesis?
alternative hypothesis?
type of test statistic?
value of the test statistic?
the p-value?
Can we support the leasing firm’s claim that the mean number of miles driven annually is less than 12800 miles?

Click here to see answer by stanbon(57979)

Question 632436: Use data from the following table which shows preferences for various pets by owner gender.
Gender of owner Cats Dogs Other Pets Total
Female 100 50 30 180
Male 50 50 20 120
Total 150 100 50 300
Part II: Find the probability that a randomly chosen person has the following characteristics:
(a) Is female and owns a dog, P(F  D)
(b) Is male and owns a dog, P(M  D)
[5 marks]

Part II: Find the following conditional probabilities for a randomly chosen person:
(c) Owns a dog, given that the person is female, P(D|F)
[5 marks]

(d) Owns a dog, given that the person is male, P(D|M)

Click here to see answer by stanbon(57979)

Question 632572: In a survey, it was reported that 33% of women believe in the existence of aliens. If 100 women are selected at random, what is the probability that more than 45% of them will say that they believe in aliens?
Click here to see answer by reviewermath(604)

Question 632574: A biologist wants to estimate with 99% confidence the proportion of people who trust dna testing. A previous study showed that 91% of those surveyed trusted DNA testing. The biologist wishes to be accurate withing 3% of the true proportion. What is the minimum sample size necessary for the biologist to carry out the analysis?
Click here to see answer by reviewermath(604)

Question 632575: in a random sample of 100 men in the U.S.A., 55 of them were married. Determine an approximate 95% confidence interval estimate for the true proportion of men who are married.
Click here to see answer by reviewermath(604)

Question 632570: In a survey of 1500 university students, 178 reported to be smokers. Test the sociologist claim that no more that 10% of university students are smokers. Use the 1% level of significance, and answer the following:
Ho:
Ha:
P-Value:

Conclusion:
Click here to see answer by stanbon(57979)

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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, 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