QUESTION 1 A professor has been teaching statistics for many years. His records show that the overall
Question:
QUESTION 1
A professor has been teaching statistics for many years. His records show that the overall mean for final exam scores is 82, with a standard deviation of 10. The professor believes that this semester's class would score much better than the previous ones, due to his newly implemented teaching technique. The mean for final exam scores for this year's class of 64 students is 86. What do you conclude? Use =0.05
Given the alpha level of .05 and using a two-tailed test,
What is the positive boundary of the critical region?
What is the negative boundary of the critical region?
1 points
QUESTION 2
A professor has been teaching statistics for many years. His records show that the overall mean for final exam scores is 82, with a standard deviation of 10. The professor believes that this semester's class would score much better than the previous ones, due to his newly implemented teaching technique. The mean for final exam scores for this year's class of 64 students is 86. What do you conclude? Use =0.05
Compute (zobt) the z-score for the sample
2 points
QUESTION 3
A professor has been teaching statistics for many years. His records show that the overall mean for final exam scores is 82, with a standard deviation of 10. The professor believes that this semester's class would score much better than the previous ones, due to his newly implemented teaching technique. The mean for final exam scores for this year's class of 64 students is 86. What do you conclude? Use =0.05
Is the z-score in the critical region?
Yes
No
1 points
QUESTION 4
A professor has been teaching statistics for many years. His records show that the overall mean for final exam scores is 82, with a standard deviation of 10. The professor believes that this semester's class would score much better than the previous ones, due to his newly implemented teaching technique. The mean for final exam scores for this year's class of 64 students is 86. What do you conclude? Use =0.05
State your decision:
Fail to reject H0
Reject H0
Reject H1
Fail to reject H1
Expert Answer:
