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

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) (Show Source): You can put this solution on YOUR website!
d through g is not answered

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