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JEE MATHEMATICS MCQ: STATISTICS

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The mode of a set of observations

7,12,8,5,6,4,9

,

10,8,9,7,9,6,5,9

is

View answer and explanation

Correct option: C

9

Option C (9) is correct because 9 appears most frequently in the given set of observations.

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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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