For each problem on this test you must write the numbers you used into the formulas you used for credit and all sentence answers must have correct punctuation and spelling. 1.(14 pts.) In a random sample of five microwave ovens, the mean repair cost was $75 and the standard deviation was $12.50. Construct a 95% confidence interval for the mean. State in words what your confidence interval means. 2. (14 pts.) You want to estimate the mean number of sentences in a magazine advertisement. How many magazine advertisements must be included in the sample if you want to be 95% confident that the sample mean is within one sentence of the population mean? Use a standard deviation of o = 5.0 sentences.For each problem on this test you must write the numbers you used into the formulas you used for credit and all sentence answers must have correct punctuation and spelling. 1.(14 pts.) In a random sample of five microwave ovens, the mean repair cost was $75 and the standard deviation was $12.50. Construct a 95% confidence interval for the mean. State in words what your confidence interval means. 2. (14 pts.) You want to estimate the mean number of sentences in a magazine advertisement. How many magazine advertisements must be included in the sample if you want to be 95% confident that the sample mean is within one sentence of the population mean? Use a standard deviation of o = 5.0 sentences