Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 18

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IMPORTANT

Earn 100

The $S . D .$ of $7$ scored $1, 2, 3, 4, 5, 6, 7$ is:

50% studentsanswered this correctly

Important Questions on Statistics

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JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 19

The variance of observations

112, 116, 120, 125, 132

is:

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 20

S.D. of first

n

natural numbers is

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 21

If

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

and

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

, then the standard deviation of the items

x_{1}, x_{2}, . . . ., x_{9}

is

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 22

If

\bar{X}

is the mean of

x_{1}, x_{2}, x_{3} \dots \dots x_{n} .

Then the algebraic sum of the deviations about mean

\bar{X}

is

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 23

Mean deviation from the mean for the observations

- 1, 0, 4

is

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 24

The mean and standard deviation of a set of values are

5

and

2

respectively. If

5

is added to each value, then what is the coefficient of variation for the new set of values?

HARD

JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 25

The variance of series

a, a + d, a + 2 d, ......, a + 2 n d

is:

HARD

JEE Main

IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 26

The

S . D .

of first

n

odd natural numbers is :-