Claim: The mean systolic blood pressure of all healthy adults is less than than

124

mm Hg. Sampledata: For

274

healthyadults, the mean systolic blood pressure level is

123.68

mm Hg and the standard deviation is

15.04

mm Hg. The null and alternative hypotheses are

H0:

=124

and

H1:

<124.

Find the value of the test statistic.

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Part 1

The value of the test statistic is