approaches the normal distribution as the degrees of freedom increase. has more area in the tails than the standard normal distribution does. All of these choices are true. Analysis: A. Incorrect. All of these choices are true. B. Incorrect. All of these choices are true. C. Incorrect. All of these choices are true. D. Correct. All of these choices are true. ANSWER: D Ref: Section 7.3 Suppose has a chi-squared distribution with 10 degrees of freedom. The mean of is: X X 10 9 20 None of these choices. Analysis: A. Correct. The mean of is 10 X B. Incorrect. The mean of is 10 X C. Incorrect. The mean of is 10 X D. Incorrect. The mean of is 10 X ANSWER: A Ref: Section 7.3 Which of the following distributions is not skewed? Student t F All of these distributions are skewed. Analysis: A. Correct. Student is not skewed. t B. Incorrect. Student is not skewed. t C. Incorrect. Student is not skewed. t D. Incorrect. Student is not skewed. t ANSWER: A Ref: Section 7.3
approaches the normal distribution as the degrees of freedom increase. has more area in the tails than the standard normal distribution does. All of these choices are true. Analysis: A. Incorrect. All of these choices are true. B. Incorrect. All of these choices are true. C. Incorrect. All of these choices are true. D. Correct. All of these choices are true. ANSWER: D Ref: Section 7.3 Suppose X has a chi-squared distribution with 10 degrees of freedom. The mean of X is: 10 9 20 None of these choices. Analysis: A. Correct. The mean of X is 10 B. Incorrect. The mean of X is 10 C. Incorrect. The mean of X is 10 D. Incorrect. The mean of X is 10 ANSWER: A Ref: Section 7.3 Which of the following distributions is not skewed? Student t F All of these distributions are skewed. Analysis: A. Correct. Student t is not skewed. B. Incorrect. Student t is not skewed. C. Incorrect. Student t is not skewed. D. Incorrect. Student t is not skewed. ANSWER: A Ref: Section 7.3
0538479825_312311.docx