Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 11

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IMPORTANT

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Let an angle of a triangle is $60 °$ . If the variance of the angles of the triangle is $4614 °$ , then the other two angles are

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Important Questions on Statistics

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 12

For the values

x_{1}, x_{2} \dots \dots x_{101}

of a distribution

x_{1} < x_{2} < x_{3} < \dots \dots < x_{100} < x_{101}

. The mean deviation of this distribution with respect to a number

k

will be minimum when

k

is equal to-

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 13

A group of

10

observations has mean

5

and standard deviation as

2 \sqrt{6}

. another group of

20

observations has mean

5

and standard deviation as

3 \sqrt{2}

, then the standard deviation of combined group of

30

observations is :-

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 14

The

S . D .

of the numbers

31, 32, 33, \dots, 47

is-

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 15

The mean deviation from mean of observations

5, 10, 15, 20, \dots \dots \dots 85

is:-

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IMPORTANT

Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 16

The variance of observations

8, 12, 13, 15, 22

, is :-

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Mathematics Crash Course JEE Main>Chapter 27 - Statistics>Level 1>Q 17

The variance of

2, 4, 6, 8, 10

is:

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

The

S . D .

of

7

scored

1, 2, 3, 4, 5, 6, 7

is:

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IMPORTANT

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

The variance of observations

112, 116, 120, 125, 132

is: