Question

and-leaf plot showing the number of pairs of the stores:
0 | 9
1 | 3 6 6 8
2 | 1 2 3 5 6 9
3 | 0
4 | 1 2 3 3 5 7
key: 4|1 = 41 pairs of glasses
how many department stores have more than 38 pairs of glasses?
department stores

Explanation:

Step1: Analyze each row

First, we look at each row of the stem - and - leaf plot. The stem represents the tens place and the leaf represents the ones place.

• For stem 0: The data is 09 (i.e., 9), which is less than 38.
• For stem 1: The data are 13, 16, 16, 18, all less than 38.
• For stem 2: The data are 21, 22, 23, 25, 26, 29, all less than 38.
• For stem 3: The data is 30, which is less than 38.
• For stem 4: The data are 41, 42, 43, 43, 45, 47. We need to check which of these are more than 38. Since the stem is 4 (40 in value) and the leaves are 1, 2, 3, 3, 5, 7, all the numbers in the stem - 4 row (41, 42, 43, 43, 45, 47) are greater than 38.

Step2: Count the number of data points in stem 4

The number of leaves in the stem - 4 row is 6 (the leaves are 1, 2, 3, 3, 5, 7). So we count these 6 data points.

Answer:

6