Question: Consider the study and regression output in Exercise 12.S.14. The P-value given on the Head line is 0.00000595. (a) What hypothesis is being tested using

Consider the study and regression output in Exercise 12.S.14. The P-value given on the "Head" line is 0.00000595.
(a) What hypothesis is being tested using this P-value? State your answer symbolically and in plain English.
(b) What conditions are necessary for the P-value to be trustworthy?

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