For the following data, approximate the mean weekly grocery bill. $$\begin{array} { c | c }
\text { Bill (in dollars) } & \text { Frequency } \
\hline 135 - 139 & 13 \
140 - 144 & 7 \
145 - 149 & 11 \
150 - 154 & 18 \
155 - 159 & 9
\end{array}$$
A) $147.30
B) $145.30
C) $149.30
D) $145.80

Question

For the following data, approximate the mean weekly grocery bill. $$\begin{array} { c | c } 
\text { Bill (in dollars) } & \text { Frequency } \
\hline 135 - 139 & 13 \
140 - 144 & 7 \
145 - 149 & 11 \
150 - 154 & 18 \
155 - 159 & 9
\end{array}$$
A) $147.30
B) $145.30
C) $149.30
D) $145.80

Quizplus · Accepted Answer

To approximate the mean, calculate the midpoint for each class, multiply by the frequency, sum these products, and divide by the total frequency. The calculation gives approximately $147.30.

For the Following Data, Approximate the Mean Weekly Grocery Bill