Question

The following stem-and-leaf plot shows a data set.

Stem Leaf
1 3 7 7
2 2 4 4 4 5
3 1 5 8 9
4 0 6 7
Key: 2|1=21

How many observations are in this data set?

47

14

19

15

Answer 1

Answer: D) 15

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Step-by-step explanation:

Ignore the stems. We count out the number of leaves

• row one: 3 leaves (3,7,7)
• row two: 5 leaves (2,4,4,4,5)
• row three: 4 leaves (1,5,8,9)
• row four: 3 leaves (0,6,7)

So we have a total of 3+5+4+3 = 15 leaves which correspond to 15 data values.