Question

managers of a sports arenas parking garage keep track of the duration of time customers park their cars there. shown in the stem - and - leaf display below is a sample of 16 such parking durations (in minutes). use the display to answer the questions that follow.
parking duration (minutes)
15|3
16|67
17|000167
18|369
19|2226
key: 15|3 means a parking duration of 153 minutes.
(a) what was the longest parking duration in the 170s?
(b) what was the longest parking duration overall?
(c) how many customers had parking durations in the 180s?

Explanation:

Step1: Identify 170s data

Look at the 17 - row in stem - and - leaf plot.

Step2: Find the largest value in 170s

The values in 17 - row are 170, 170, 170, 171, 176, 177. The largest is 177.

Step3: Identify overall data

Examine all rows in the stem - and - leaf plot.

Step4: Find the largest overall value

The largest value from all rows is 196.

Step5: Count 180s data

Count the number of values in 18 - row. There are 3 values (183, 186, 189).

Answer:

(a) 177
(b) 196
(c) 3