The mean IQ for a population is 100, and the standard deviation is 15. Girard\'s

Question

The mean IQ for a population is 100, and the standard deviation is 15. Girard's IQ is 142.

a. state the null hypothesis

b. state the research ( alternative) hypothesis.

c. If Gerard is just a random person from the popluation, what is the probability that his IQ would be so high?

d. You have not learned the standards for rejecting or retaining the null hypothesis. however given the percentage of people with IQs as high or higher than Girard's in this population, does it seem like Gerard's IQ is high enough to reject the null hypothesis? justify your decision

Explanation / Answer

The mean IQ for a population is 100, and the standard deviation is 15. Girard's

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