7. What factors influence the power of a statistical test?

8. A scientists is conducting an experiment to see if varying the amount of sleep participants

get will increase their score on an IQ test. We know that the average IQ score is 100.

a. What would be the null and alternative hypothesis for this experiment? Provide the answer in terms of the symbols used and explain in your own words.

b. What kind of hypothesis is this?

c. If the researcher rejects the null hypothesis, but in fact it's true and the amount of sleep does not increase participants' IQ scores, what kind of error is this?

c. If the researcher rejects the null hypothesis, but in fact it's true and the amount of sleep does not increase participants' IQ scores, what kind of error is this? (1pt.)