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Thirteen students were randomly selected from the College of Public Health and their diastolic blood pressure was tested. The sample mean and...

Thirteen students were randomly selected from the College of Public Health and their diastolic blood pressure was tested. The sample mean and standard deviation were 80.9 mmHg and 2.1 mmHg respectively. What is the obtained t-score for this sample under the null hypothesis Ho: µ = 80?

-1.57
1.55
-2.71
2.60


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