Stats Homework Problem

5.10 t vs. Z : For a given confidence level t af is larger than z . Explain how t of being slightly larger than z affects the width of a confidence interval. 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 wider because the margin of error will be larger The confidence interval using the t distribution will be more narrow because the margin of error will shrink