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Rising prescription drug prices caused the U.S. Congress to consider laws that would force pharmaceutical companies to offer prescription discounts to senior citizens without drug benefits. The House Government Reform Committee provided data on the prescription cost of some of the most widely used drugs (Newsweek, May 8, 2000). Assume the following data show a sample of the prescription cost in dollars for Zocor®, a drug used to lower cholesterol: 110, 112, 115, 99, 100, 98, 104, and 126. Assuming a normal population distribution, what is the 95% confidence interval estimate of the population mean cost for a prescription of Zocor? _____________________ .
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
Calculate a 95% confidence interval for the population mean, based on the sample 10, 12, 13, 14, 15, 16, and 49.
When using the distribution of sample means to estimate the population mean, what is the benefit of using larger sample sizes?
How large a sample should be taken if the desired margin of error E is:
The margin of error for a 95% confidence interval estimate for the proportion of all students with cell phones is
What is the probability that all three students pick exactly the same card?
Complete the table and answer the following questions. Use the .05 significance level.
What is the probability that a roulette ball will come to rest on an even number other than 0 and 00?
Write a one-page report to Ms. Gupta presenting your conclusions regarding the market performance of Brand 1.
Which of the following Venn diagrams has shaded the event that the contractor wins exactly one of the contracts and evaluate the mean time to complete the entire homework assignment
What is the 95% confidence interval for the difference between the mean prices of the two models?
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
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