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A study was designed to see if increased dietary calcium intake reduces blood pressure. Ten men...

A study was designed to see if increased dietary calcium intake reduces blood pressure. Ten men were given a calcium supplement for 12 weeks. Blood pressure was measured both before and after the 12 week period. Supposed that the following data are the decreases is in blood pressure for the 10 subjects.

7, 5, 5, 17, -8, -5, 1, 10, 11 , -2

State the appropriate null and alternative hypothesis in terms of mu.

Math   Statistics-And-Probability   
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Answer #1

We state the null hypothesis in such a way that by rejecting it, we can get our desired results.

In this experiment, the researcher wants to see if average reduction in blood pressure due to increased dietary calcium intake is greater than zero or not, and hence if we can reject the null(that the average reduction in blood pressure is less than or equal to zero), we can get our desired result. Hence, the null hypothesis will be

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