Which of the Following Is True of Calculating Confidence Intervals

Multiple Choice

Which of the following is true of calculating confidence intervals for larger samples?

A) For larger samples, the t-distribution is indistinguishable from the standard normal distribution.
B) For larger samples, both the t-distribution and the standard normal distribution require standard deviation values to be calculated.
C) For larger samples, the degrees of freedom cannot be calculated accurately.
D) For larger samples, only z-values provide a true sampling distribution of the mean.