SOLUTION: 1. A professor has been teaching statistics for many years. His records show that the overall mean for final exam scores is 85 with a standard deviation of 10. He believes that

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Question 708639: 1. A professor has been teaching statistics for many years. His records show that the overall mean for final exam scores is 85 with a standard deviation of 10. He believes that this year’s class is superb to the previous classes. The mean for the 40 students is 90.
a. What is the null hypothesis? He believes that this year’s class is superb to the previous classes.
b. What is the research hypothesis? He records show that the overall mean for final exam scores is 85 with a standard deviation of 10.
c. Is this a one or two tailed hypothesis? One
d. Which test should you use? Why?
e. Calculate the appropriate statistical test.
f. What is the critical value for α = .05?
g. What do you conclude?
Answer by maelynn777(1) About Me  (Show Source):
You can put this solution on YOUR website!
d through g is not answered