Archie is fed up with waiting in line at his local post office and decides to ta

Question

Archie is fed up with waiting in line at his local post office and decides to take action. Over the course of the next few months, he records the waiting times for each of a random selection of 25 post office visits made by him and other customers. These waiting times (in minutes) are summarized in the following histogram: 8- 6 0 12 18 24 30 Waiting time (in minutes) Based on the histogram, find the proportion of waiting times in the sample that are greater than or equal to 18 minutes. Write your answer as a decimal, and do not round your answer.

Explanation / Answer

number of waiting times more than 18 are 2+2 =4

total is 6+8+7+2+2 =25

so proportion of waiting times more than 18 = 4/25 =0.16

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