# statistics

posted by .

The following list is a sampling of the costs of various statistics textbooks used at several colleges. Give the upper confidence limit for a 95% confidence interval estimate for the mean cost of all statistics textbooks.
109.95; 92.00; 96.70; 84.85; 92.60; 84.45; 90.95; 77.00; 75.50

• statistics -

Formula:

CI95 = mean ± 1.96(sd/√n)

You will need to calculate the mean and standard deviation for your data. In the formula, n = sample size.

Once you have what you need, substitute into the formula and determine the confidence interval.

I hope this will help get you started.

• statistics -

28.22

## Similar Questions

1. ### Statistics

Which of the following statements correctly interprets a 95% confidence interval on a population mean?
2. ### Statistics

A confidence interval was used to estimate the proportion of statistics students that are females. A random sample of 72 statistics students generated the following 90% confidence Interval: (.43, .63). based on the interval above, …
3. ### statistics

Help!!!!!! A confidence interval estimate for the population mean is given to be (39,90, 48.11) If the standard deviation is 11.473 and the sample size is 52 determine the maximum error of the estimate. determine the confidence level …
4. ### statistics

Can someone guide me on how to solve this problem: A sample of 52 night students ages is obtained in order to estimate the mean age of night school students. sample mean = 25.9 years. the population variance is 23. Give a point estimate …
5. ### math check

While writing an article on the high cost of college education, a reporter took a random sample of the cost of new textbooks for a semester. The random variable x is the cost of one book. Her sample data can be summarized by the following. …
6. ### statistics

A data set includes body temperatures of healthy adult humans for which x= 98.2 and s=0.64 F. Complete parts a) and b) below a) what is the best point estimate of the mean body temperature of all healthy humans?
7. ### statistics

Describe whether the following study would most likely be “observational” or “experimental”, and why it would be so. A survey examines the preferences for laundry detergent. ***The admissions office wants to estimate the cost …
8. ### statistics HELP!

A data set includes body temperatures of healthy adult humans for which 98.1F and s= 0.56F. What is the best point estimate of the mean body temperature of all healthy humans?
9. ### Statistics

A sample of 53 night-school students' ages is obtained in order to estimate the mean age of night-school students. = 25.7 years. The population variance is 12. (a) Give a point estimate for mu. (b) Find the 95% confidence interval …
10. ### statistics

A sample of 65 night-school students' ages is obtained in order to estimate the mean age of night-school students. x bar = 25.2 years. The population variance is 28. (a) Give a point estimate for ì. (Give your answer correct to one …

More Similar Questions