IMathAS-libretexts

5.10 t^* vs. z^*: For a given confidence level t^*_df is larger than z^*. Explain how t^*_df being slightly larger than z^* affects the width of a confidence interval.

The confidence interval using the t distribution will be wider because the margin of error will be larger
The confidence interval using the t distribution will be more narrow because we are working with a small sample
The confidence interval using the t distribution will be wider because the standard error is larger
The confidence interval using the t distribution will be more narrow because the margin of error will shrink

License