# Question: A consumer agency wants to estimate the proportion of all

A consumer agency wants to estimate the proportion of all drivers who wear seat belts while driving. Assume that a preliminary study has shown that 76% of drivers wear seat belts while driving. How large should the sample size be so that the 99% confidence interval for the population proportion has a margin of error of .03?

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Refer to Exercise 8.94. What is the most conservative estimate of the sample size that would limit the margin of error to within .03 of the population proportion for a 99% confidence interval? Complete the following sentences using the terms population parameter and sample statistic. a. Estimation means assigning values to a ___________ based on the value of a ___________. b. An estimator is a ___________ used to ...Multiple choice questions: 2. A 95% confidence interval for µ can be interpreted to mean that if we take 100 samples of the same size and construct 100 such confidence intervals for µ, then a. 95 of them will not include ...Consider the following null and alternative hypotheses: H0: p = .44 versus H1: p < .44 A random sample of 450 observations taken from this population produced a sample proportion of .39. a. If this test is made at a 2% ...The customers at a bank complained about long lines and the time they had to spend waiting for service. It is known that the customers at this bank had to wait 8 minutes, on average, before being served. The management made ...Post your question