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Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 11.3 - Problem 22
Get Full Access to Statistics: Informed Decisions Using Data - 5 Edition - Chapter 11.3 - Problem 22

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# ?Comparing Flexibility A physical therapist believes that women are more flexible than men. She measures the flexibility of 31 randomly selected women

ISBN: 9780134133539 240

## Solution for problem 22 Chapter 11.3

Statistics: Informed Decisions Using Data | 5th Edition

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Statistics: Informed Decisions Using Data | 5th Edition

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Problem 22

Comparing Flexibility A physical therapist believes that women are more flexible than men. She measures the flexibility of 31 randomly selected women and 45 randomly selected men by determining the number of inches subjects could reach while sitting on the floor with their legs straight out and back perpendicular to the ground. The more flexible an individual is, the higher the measured flexibility will be. After entering the data into Minitab, she obtained the following results:

(a) State the null and alternative hypotheses.

(b) Identify the P-value and state the researcher’s conclusion if the level of significance was  = 0.01.

(c) What is the 95% confidence interval for the mean difference in flexibility of men versus women? Interpret this interval.

Step-by-Step Solution:

Step 1 of 5) Comparing Flexibility A physical therapist believes that women are more flexible than men. She measures the flexibility of 31 randomly selected women and 45 randomly selected men by determining the number of inches subjects could reach while sitting on the floor with their legs straight out and back perpendicular to the ground. The more flexible an individual is, the higher the measured flexibility will be. After entering the data into Minitab, she obtained the following results: (a) State the null and alternative hypotheses. (b) Identify the P-value and state the researcher’s conclusion if the level of significance was = 0.01. (c) What is the 95% confidence interval for the mean difference in flexibility of men versus women Interpret this interval. There are many tests for comparing variances.

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?Comparing Flexibility A physical therapist believes that women are more flexible than men. She measures the flexibility of 31 randomly selected women