sample mean and the sample standard deviation. Assume normally distributed and use the t-distribution to find the margin

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Sample Mean And The Sample Standard Deviation Assume Normally Distributed And Use The T Distribution To Find The Margin 1 (64.58 KiB) Viewed 33 times

sample mean and the sample standard deviation. Assume normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean. Interpret the results. If convenient, use technology to construct the confidence interval. 17. Commute Time In a random sample of eight people, the mean commute time to work was 35.5 minutes and the standard deviation was 7.2 minutes. 18. Driving Distance In a random sample of five people, the mean driving distance to work was 22.2 miles and the standard deviation was 5.8 miles. 9. Microwave Repairs In a random sample of 13 microwave ovens, the mean repair cost was $80.00 and the standard deviation was $13.50. 0. Computer Repairs In a random sample of seven computers, the mean repair cost was $110.00 and the standard deviation was $44.50. 1. You research commute times to work and find that the population standard deviation is 9.3 minutes. Repeat Exercise 17, using the standard normal distribution with the appropriate calculations for a standard deviation that is known. Compare the results.