Hypothesis Testing of Mean:
Evidence that executive blood pressures differ from the national average
Do middle-aged male executives have
different average blood pressure than the general population? The National
Center for Health Statistics reports that the mean systolic pressure for males
ages 35 to 44 is 128 and the standard deviation of this population is 15. The
medical director of a company looks at the medical records of 72 company
executives in this age group and finds that the mean systolic blood pressure in
this sample is 126.07. Is this evidence that executive blood pressures differ
from the national average? Use a 5% level of significance.
State the Null Hypothesis and the
Alternative Hypothesis.
Determine the test statistic.
Determine the P-value.
Make a decision regarding the
hypotheses based on the P-value and the Level of Significance.
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