Suppose that for a particular study the expected value of a phenomenon is 0.00.

Question

Suppose that for a particular study the expected value of a phenomenon is 0.00. The study results in a reported 95% confidence interval of [-0.68, 0.11]. What decision do you make based on the 95% confidence interval?

A) Reject the null because this interval is unexpectedly small.

B) Fail to reject the null because the population mean is within the confidence interval.

C) Reject the null because the population mean is within the confidence interval.

D) Fail to reject the null because this interval includes negative values.

Explanation / Answer

Option B) fail to reject the null because the population mean is within the confidence interval.

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