Question

the accompanying data set lists diastolic blood - pressure measurements (mm hg) of females. all of the values are even numbers. construct a stemplot. identify the two values that are closest to the middle when the data are sorted in order from lowest to highest. (these values are often used to find the median.) 90 70 84 88 76 64 70 66 76 68 96 72 72 74 94 76 70 62 70 60 72 66 66 68 construct the stemplot.

Explanation:

Step1: Organize data for stemplot

First, we consider the tens - digit as the stem and the units - digit as the leaf.

Step2: Construct stemplot

6 | 0 2 4 6 6 6 8
7 | 0 0 0 0 2 2 2 4 6 6 6 6 8
8 | 4 8
9 | 0 4 6

Step3: Find the median - related values

There are 25 data points. When the data is sorted, the 12th and 13th values are used to find the median. Sorting the data: 60, 62, 64, 66, 66, 66, 68, 70, 70, 70, 70, 72, 72, 72, 74, 76, 76, 76, 76, 78, 84, 88, 90, 94, 96. The 12th value is 72 and the 13th value is 72.

Answer:

Stemplot:
6 | 0 2 4 6 6 6 8
7 | 0 0 0 0 2 2 2 4 6 6 6 6 8
8 | 4 8
9 | 0 4 6
Values closest to the middle: 72, 72