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Chapter 9: Q 3.2. (page 577)

The health director of a large company is concerned about the effects of stress on the company鈥檚 middle-aged male employees. According to the National Center for Health Statistics, the mean systolic blood pressure for males 35 to 44 years of age is 128 The health director examines the medical records of a random sample of 72 male employees in this age group. The Minitab output below displays the results of a significance test and a confidence interval.

Interpret the 95% confidence interval in context. Explain how the confidence interval leads to the same conclusion as in Question 1

Short Answer

Expert verified

There is insufficient information to infer that the company's middle-aged male employees' mean blood pressure differs from the national average.

Step by step solution

01

Given information

The output is:

02

Concept

H0鈭�渭=0Ha:渭鈮�0

03

Explanation

The 95percent confidence interval is calculated using the Minitab output (126.43,133.43)As a result, there is a 95%likelihood that the mean systolic blood pressure of males aged 35-44falls between 126.43and 133.43Because 128is inside the estimated confidence interval. As a result, there is insufficient information to infer that the company's middle-aged male employees' mean blood pressure differs from the national average.

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