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JEE MATHEMATICS MCQ: STATISTICS

1 Easy

1 of 1

Application +4 | -1

For a series, the information available is

n=10

,

\Sigma x=60

and

\Sigma x^2=1000

. The standard deviation is

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Correct option: A

8

Option A (8) is correct because the standard deviation is calculated using the formula and given values, resulting in 8.

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\bar X,

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is The sum of 10 items is 12 and sum of their squares is 18 , then standard deviation will be In a family, there are 8 men, 7 women and 5 children whose mean ages separately are respectively 24,20 and 6 years. The mean age of the family is The mean and variance of seven observations are 8 and 16, respectively. If 5 of the observations are 2, 4, 10, 12, 14, then the product of the remaining two observations is

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