Question

Find 9th decile and 55th percentile for the following data. C.I 1-3 3-5 5-7 7-9 9-11 11-13 13-15 f 6 53 85 56 21 16 4​

Answer 1

• Correct option is B 25

Answer:-

The cumulative frequency Table is:-

Class Frequency Cumulative frequency

0-5 10 10

5-10 15 25

10-15 12 37

15-20 20 57

20-25 9 66

HeHer =33

Thus 37 is just greater than 33,

∴ The median class is "10−15."

The lower limit of the median class is 10.

Modal class = class with maximum frequency.

∴ Modal class is 15−20.

The lower limit of the modal class is 15.

Sum of lower limits of median class and modal class = 10+15=25

Answer 2

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