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Question

Find the mode(s) of the following data set. Stem Leaf

1
2
4
9,0,1,9
0,0,3
1,5,6

Key:1|1 means 11

A
9
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B
0
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C
19
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D
20
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Solution

The correct option is D 20
Arrange the given stem and leaf plot in ascending order. Stem Leaf
1
2
4
0,1,9,9
0,0,3
1,5,6

Given key:1|1 means 11

The data points are obtained by merging the stem number with corresponding leaf numbers.
Example:

For the given plot, the data points are: {10,11,19,19,20,20,23,41,45,46}

We know mode is/are the most popular data point(s).

19 and 20 appear twice.
Hence, 19 and 20 are the modes of the given data set.

It is a bimodal data set.

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