If you wish to estimate with 95% confidence the average number of miles that students living off-campus commute to classes every day, a random sample of 20 students produced a mean equal to 5.2 miles and a standard deviation of 3.05 miles. Then the point estimate for the true population mean is: 3.22 6.63 1.96 2.15 5.20
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If you wish to estimate with 95% confidence the average number of miles that students living off-campus commute to classes every day, a random sample of 20 students produced a mean equal to 5.2 miles and a standard deviation of 3.05 miles. Then, the upper limit for a 95% confidence interval estimate for the true population mean is approximately?
Robin C.
You are interested in finding a 95% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 10 randomly selected non-residential college students. 23 27 21 21 7 26 10 18 25 23 a. To compute the confidence interval use a ? distribution. b. With 95% confidence the population mean commute for non-residential college students is between _____ and _______ miles. c. If many groups of 10 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About _______ percent of these confidence intervals will contain the true population mean number of commute miles and about ______ percent will not contain the true population mean number of commute miles.
Joshua A.
You are interested in finding a 98% confidence interval for the average commute that non-residential students have to their college. The data below show the number of commute miles for 15 randomly selected non-residential college students. Round answers to 3 decimal places where possible. 13 19 26 26 19 16 26 14 11 28 9 22 11 12 13 a. To compute the confidence interval use a ? z t distribution. b. With 98% confidence the population mean commute for non-residential college students is between and miles. c. If many groups of 15 randomly selected non-residential college students are surveyed, then a different confidence interval would be produced from each group. About percent of these confidence intervals will contain the true population mean number of commute miles and about percent will not contain the true population mean number of commute miles.
Sheryl E.
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