Which of the following are correct about t-test statistics?
(A) The mean of t-test distribution is 0.
(B) It depends on the degrees of freedom.
(C) It depends on population standard deviation.
(D) With more degrees of freedom, it closely resembles standard normal distribution.
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → (A), (B) and (D) only
Correct statements about t-test statistics:
(A) The mean of the t-distribution is 0 → ✔ Correct
(B) It depends on the degrees of freedom → ✔ Correct
(C) It depends on population standard deviation → ✘ Incorrect The t-test is used when population standard deviation is unknown.
(D) With more degrees of freedom, it approaches the standard normal distribution → ✔ Correct
Correct statements: A, B, D.