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Question -

In this 100 surnames were randomly picked up from a local telephone directory and the frequency distribution of the number of letters in English alphabets in the surnames was obtained as follows:



Answer -


Number of letters

1-4

4-7

7-10

10-13

13-16

16-19

Number of surnames

6

30

40

16

4

4

Determine the numberof median letters in the surnames. Find the number of mean letters in thesurnames and also, find the size of modal in the surnames.

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