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Question

Consider the data set: 16,14,15,19,14,18,12,14

If 1 is included in the data set, what would be the effect on the median of the dataset?

A
Median will increase.
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B
Median will decrease.
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C
Median will be the same.
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Solution

The correct option is B Median will decrease.
Data set in increasing order without including 20 : 12,14,14,14,15,16,18,19

The median of data set = mean of 4th & 5th position

=14+152=14.5

Data set in increasing order including 1 : 1,12,14,14,14,15,16,18,19

The median of data set =14

We can see on including 1, the median of the dataset decreased.

In the data set : 1,16,14,15,19,14,18,12,14

1 is the outlier.

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