Question

Suppose we are testing the null hypothesis H0: ì = 20 and the alternative Ha: ì 20, for a normal population with ó = 5. A random sample of 25 observations are drawn from the population, and we find the sample mean of these observations is = 17.6. The P-value is closest to?

A. 0.0668.
B. 0.0082.
C. 0.0164.
D. 0.1336.

Two tailed. = 0.0164
Left tailed = 0.0082

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