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A basketball player has a 79% chance of making a free throw. What is the probability of her making 97 or more free throws in 118 trials? Round your standard normal variable to two decimal places before using the table of values?
Describe the sample distribution of p-hat, the sample proportion of college students with cell phones who send or receive text messages with their phones.
Balls that have been thoroughly mixed. Sue and Jim, each, purchased one gumball. What is the likelihood both Sue and Jim get red gumballs?
What is the best point estimate of the mean weight of babies born to mothers who did not use cocaine during their pregnancies?
A researcher conductued a study of the access speed of 35 hard drives and concluded that his maximum error of estimate was 35. If he were to conduct a second study to reduce the maximum error of estimate to 7, about how many hard drives should he ..
Testing equality of variances - evidence of a difference in the variability of monthly talking time on cell phones for men and women?
At 0.01 significance level is it sensible to conclude that modification reduced number of traffic accidents?
Two years ago, a survey of all Wal-Mart customers indicated that the mean number of items bought per day by male customers was 8.3 with a standard deviation of 3.7.
A survey conducted by the American Automobile Association showed that the family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls results in a sample mean of $252...
54% of men consider themselves professional baseball fans. You randomly select 10 men and ask if he considers himself a fan. Find the probability that the number who consider themselves professional fans is
As a part of the feasibility study, they wish to estimate the mean weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week.
All of these cars are for sale by dealers. Produce a dotplot of the prices and comment on features of the dotplot. Suggest a reasonable asking price for the 2005 Escape. Explain your reasoning.
Compute the probability that student eats at fast food restaurant 2 or more times per week?
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