You are asked to determine whether or not brunette students have a higher IQ score than other students. To do so, you administer an IQ test to a random sample of 300 brunette students. It is known that the national average IQ score of students is 100. Your sample produces an average IQ score of 101, with a standard deviation of 12 points. The level of significance is a = .05.
1. What is the most likely null hypothesis?
A. u =100
B. u?100
C. u>100
D. u<100
2. What is the most likely alternative/research hypothesis?
A. u =100
B. u?100
C. u>100
D. u<100
3. What is the standard error?
4. What is the critical test score?
5. What is the test statistic?