The Grade Point Averages for 10 Randomly Selected Students in a Statistics

question 18

Essay

The grade point averages for 10 randomly selected students in a statistics class with 125 students are listed
below. $\begin{array} { l l l l l l l l l l } 2.0 & 3.2 & 1.8 & 2.9 & 0.9 & 4.0 & 3.3 & 2.9 & 3.6 & 0.8\end{array}$ What is the effect on the width of the confidence interval if the sample size is increased to 20? Explain your
reasoning.