Posted by **Rob** on Monday, March 7, 2011 at 8:01am.

Part 1)

A physical therapists wishes to determine whether an exercise program increases flexibility. He measures the flexibility (in inches) of 12 randomly selected subjects both before and after an intensive eight-week training program and obtains the following data:

Before: 18.5, 21.5, 16.5, 21, 20, 15, 19.75, 15.75, 18, 22, 15, 20.5

After: 19.25, 21.75, 16.5, 20.5, 22.25, 16, 19.5, 17, 19.25, 19.5, 16.5, 20

Test the claim that the flexibility before the exercise program is less than the flexibility after the exercise program at a significance level of 0.01. Note: the data is approximately normal with no outliers.

Part 2)

Using the data from the previous problem, construct a 95% confidence interval about the population mean difference. Interpret your result.

Any help would be greatly appreciated. Thank you for your time.

## Answer This Question

## Related Questions

- Health (Ms. Sue) - 1. Summarize the steps to designing a fitness program. A: The...
- statistics - DO I NEED TO USE 2-TAILED OR 2-TAILED RESULTS? WHY? A researcher ...
- Statistics - A packing company investigates a national training consultant in ...
- Sport Psychology - Which of the following types of exercise reliability reduce ...
- Statistics - Suppose a researcher wants to study the effectiveness of a new ...
- Statistics - The psychologists are interested in whether depressed people ...
- MATH - Suppose a researcher wants to study the effectiveness of a new reading ...
- biostatistics - A clinical trial is run to assess the effects of different ...
- Statistics - Suppose a researcher wants to study the effectiveness of a new ...
- 8th grade - Suppose a researcher wants to study the effectiveness of a new ...

More Related Questions