Research Has Been Conducted That Studies the Role That the Age

Multiple Choice

Research has been conducted that studies the role that the age of workers has in determining the hours per month spent on personal tasks.A sample of 1,686 adults were observed for one month.The data are: $\begin{array}{llll}&\text { AGE GROUP }\\&18-24&25-44&45-64\\\text { Mean } & 4.17 & 4.04 & 4.31 \\\text { Std Dev } & 0.75 & 0.81 & 0.82 \\\mathrm{~N} & 241 & 768 & 677\end{array}$
A 98% confidence interval for the mean hours spent on personal tasks would be _____.

A) [3.96,4.12]
B) [4.12,4.21]
C) [3.98,4.10]
D) [2.16,5.92]
E) [3.95,4.13]