Question

The following waiting times and frequencies were recorded for customers checking out at a grocery store: Select an appropriate distribution, and determine the mean waiting time in minutes.Choose one answer.a. 8b. 2c. 1d. 4

Answer 1

The table for this is shown below

From the table, the mean becomes

`\begin{gathered} mean(\bar{x})=(\sum_^fx)/(\sum_^f) \\ =(367)/(86) \\ =4.2674418 \end{gathered}`

Hence looking at the options, the answer is 4, option D