A local group claims that the police issue at least 60 speed

A local group claims that the police issue at least 60 speeding tickets a day in their area. To prove their point, they randomly select one month. Their research yields the number of tickets issued for each day. The data are listed below. Assume the population standard deviation is 12.2 tickets. At alpha = 0.01, test the group s claim. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Suppose you want to test the claim that mu = 3.5. Given a sample size of n = 40 and a level of significance of alpha = 0.05, when should you reject H_0? Write the word or phrase that best completes each statement or answers the question. In a sample of 10 randomly selected women, it was found that their mean height was 63.4 inches. From previous studies, it is assumed that the standard deviation, sigma, is 2.4 inches and that the population of height measurements is normally distributed. Construct the 99% confidence interval for the population mean height of women. If the sample size was doubled to 20 women, what will be the effect on the confidence interval? A manufacturer receives an order for fluorescent light bulbs. The order requires that the bulbs have a mean life span of 850 hours. The manufacturer selects a random sample of 25 fluorescent light bulbs and finds that they have a mean life span of 845 hours with a standard deviation of 15 hours. Test to see if the manufacturer is making acceptable light bulbs. Use a 95% confidence level. Assume the data are normally distributed. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. The mean age of bus drivers in Chicago is 50.3 years. If a hypothesis test is performed, how should you interpret a decision that fails to reject the null hypothesis? You wish to test the claim that mu = 14 at a level of significance of mu = 0.05 and are given sample statistics n = 35, x = 13.1. Assume the population standard deviation is 2.7. Compute the value of the standardized test statistic. Round your answer to two decimal places.

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