Find Q1 for the data 23, 7, 11, 9, 15, 12, 20 and 18.
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Text Solution
Arranging the given observations in ascending order, we have 7, 9, 11, 12, 15, 18, 20, 23.
Here n = 8 (n is even)
∴ first quartile, Q1=(n4)th item=(84)th item.
second observation of the data, i.e., 9.
∴Q1=9.
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Updated on:21/07/2023
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