A credit company has gathered information regarding the average amount owed by people under 30 years old and by people over 30 years. Independent random samples were taken from both age groups. You are given the following information.
$\begin{array}{ll}&\text { Under } 30&\text { Over } 30\
&600 & 550 \
n&200 & 300 \
\sigma^2&361 & 400
\end{array}$ Construct a 95% confidence interval for the difference between the average amounts owed by the two age groups.

Question

A credit company has gathered information regarding the average amount owed by people under 30 years old and by people over 30 years. Independent random samples were taken from both age groups. You are given the following information.
 $\begin{array}{ll}&\text { Under } 30&\text { Over } 30\
&600 & 550 \
n&200 & 300 \
\sigma^2&361 & 400
\end{array}$ Construct a 95% confidence interval for the difference between the average amounts owed by the two age groups.

Quizplus · Accepted Answer

The Answer of A credit company has gathered information regarding the average amount owed by people under 30 years old and by people over 30 years. Independent random samples were taken from both age groups. You are given the following information.
 $\begin{array}{ll}&\text { Under } 30&\text { Over } 30\
&600 & 550 \
n&200 & 300 \
\sigma^2&361 & 400
\end{array}$ Construct a 95% confidence interval for the difference between the average amounts owed by the two age groups.

A Credit Company Has Gathered Information Regarding the Average Amount Under 30 Over 30600550n200300σ2361400\begin{array}{ll}&\text { Under } 30&\text { Over } 30\\&600 & 550 \\n&200 & 300 \\\sigma^2&361 & 400\end{array}nσ2​ Under 30600200361​ Over 30550300400​

A Credit Company Has Gathered Information Regarding the Average Amount $\begin{array}{ll}&\text { Under } 30&\text { Over } 30\\&600 & 550 \\n&200 & 300 \\\sigma^2&361 & 400\end{array}$