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Claim: The mean systolic blood pressure of all healthy adults is less than than 121 mm Hg. Sampledata: For 261 healthyadults, the mean systolic blood

Claim: The mean systolic blood pressure of all healthy adults is less than than 121 mm Hg. Sampledata: For 261 healthyadults, the mean systolic blood pressure level is 120.88 mm Hg and the standard deviation is 15.27 mm Hg. The null and alternative hypotheses are H0: =121 and H1: <121. Find the value of the test statistic.

The value of the test statistic is

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