14 points Jubilation T. Cornpone is fixated on investigating whether his \"lucky

Question

14 points Jubilation T. Cornpone is fixated on investigating whether his "lucky" (Confederate) silver dollar is in fact a fair coin. Every day he tosses the coin 100 times, and conducts a hypothesis test to investigate. His hypotheses are: Ho: coin is fair HA: coin is not fair He does this every day for twenty years - a total of 7305 tests (365*20, plus 5 more for leap years). 9 0 Let us suppose, for sake of argument, that Jubilation's "lucky" coin is really a fair coin. How often, out of those 7305 days, will he reject his null hypothesis? Approximately none of the time. Approximately five percent of the time. Approximately fifty percent of the time. Approximately ninety-five percent of the time. Approximately all of the time.

Explanation / Answer

generally we use 5% level of significance i.e.

the probability of rejecting the null hypothesis given that it is true =0.05.

it means for long run or large sample size 5% cases the null hypothesis will be rejected

so right choice is -approximately five percent of time

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