DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 14 - Statistics>PERIODIC TEST (Paper Pen Test)>Q 6

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IMPORTANT

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While computing mean of grouped data, we assume that the frequencies are:

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Important Questions on Statistics

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10th CBSE

IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 14 - Statistics>PERIODIC TEST (Paper Pen Test)>Q 7

In the formula

\bar{x} = a + \frac{\sum f_{i} d_{i}}{\sum f_{i}}

, for finding the mean of grouped data,

d_{i}

's are deviations from

' a'

of

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DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 14 - Statistics>PERIODIC TEST (Paper Pen Test)>Q 8

The median and mode of a distribution are $21.2$ and $21.4$ respectively. Find its mean.

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DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 14 - Statistics>PERIODIC TEST (Paper Pen Test)>Q 9

The numbers

5, 7, 10, 12, 2 x - 8, 2 x + 10, 35, 41, 42, 50

are arranged in ascending order. If their median is

25

. Find

x

.

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IMPORTANT

DINESH LAB MANUAL IN MATHEMATICS CLASS X>Chapter 14 - Statistics>PERIODIC TEST (Paper Pen Test)>Q 10

If

\sum f_{i} = 11, \sum f_{i} x_{i} = 2 x + 52

and the mean of any distribution is

6

. Find the value of

x