Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 24

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IMPORTANT

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If the coefficient of variation and standard deviation are $60$ and $21$ respectively, then the arithmetic mean of distribution is

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Important Questions on Statistics

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 25

If

\sum_{i = 1}^{9} (x_{i} - 5) = 9

and

\sum_{i = 1}^{9} {(x_{i} - 5)}^{2} = 45

, then the standard deviation of

9

items

x_{1}, x_{2}, \dots, x_{9}

is

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 26

The standard deviation of

9, 16, 23, 30, 37, 44, 51

is

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 27

The mean of four observations is

3

. If the sum of the squares of these observations is

48

, then their standard deviation is

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 28

The sum of deviations of the variates from the arithmetic mean is always

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 29

The mean of five observations is

4

and their variance is

5.2

. If three of these observations are

1, 2

and

6

, then the other two are

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 30

The

A . M .

of

9

terms is

15

. If one more term is added to this series, then the

A . M .

becomes

16

. The value of the added term is

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 31

If the median of

\frac{x}{5}, x, \frac{x}{4}, \frac{x}{2}, \frac{x}{3} (x > 0)

is

8

, then the value of

x

is

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Complete Study Pack for Engineering Entrances Objective Mathematics Vol 1>Chapter 20 - Statistics>Entrances Gallery>Q 33

If the standard deviation of

3, 8, 6, 10, 12, 9, 11, 10 12, 7

is

2.71

, then the standard deviation of

30, 80, 60, 100, 120, 90, 110, 100, 120, 70

is