When doing inference on a single mean with a small sample size, which of the fol

Question

When doing inference on a single mean with a small sample size, which of the following is the correct justification for using the t-distribution rather than the normal distribution?

Select one:

a. None of these choices are a correct justification for using the t-distribution.

b. Because the standard error estimate may be inaccurate due to small sample size.

c. Because the t-distribution is not symmetric.

d. Because data obtained from small sample sizes are often highly skewed.

e. All of these choices are correct justifications for using the t-distribution.

Explanation / Answer

We have

Correct answer is

d. Because data obtained from small sample sizes are often highly skewed.

The t-distribution is symmetric.

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