A process that produces bottles of shampoo, when operating correctly, produces bottles whose contents weight, on average, 20 ounces. A rando
A process that produces bottles of shampoo, when operating correctly, produces bottles whose contents weight, on average, 20 ounces. A random sample of nine bottles from a single production run yielded the following content weights (in ounces):
21.4 19.7 19.7 20.6 20.8 20.1 19.7 20.3 20.9
Assume that the population distribution is normal.
a. Enter the data in Excel and get the descriptive statistics.
b. Conduct a 95% confidence interval for the population mean. Show your work.
c. Test at the 5% level against a two-sided alternative that the null hypothesis that the process is operating correctly.
d. Use PHStat to get the test results for part c. (PHStat is an Add-in from your textbook. You need to install this Add-in before you can use PHStat. See page 53 of the course packet.)
e. The PHStat printout in part d gives you the p-value. Use this p-value to conduct the test for part c.
in progress 0Math 2 weeks 2021-09-11T01:49:56+00:00 2021-09-11T01:49:56+00:00 1 Answer 0