Statistics

Subject matter experts of JagranJosh have developed a chapter wise practice sets as per the relevancy of the chapter in the board exam. This practice set contains 10 questions with detailed explanations on “Chapter: Statistics” of Mathematics.

  • Q1. In the formula  x ¯ =a+ f i d i f i , for finding the mean of grouped data  d i s are deviations from the:

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  • Q2.While computing mean of the grouped data, we assume that the frequencies are:

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  • Q3. If  x i s are the midpoints of the class intervals of grouped data,  f i s are the corresponding frequencies and  x ¯  is the mean , then  ( f i x i x ¯ )  is equal

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  • Q4.The abscissa of the point of intersection of the less than type and of the more than type cumulative frequency of a grouped data gives its:

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  • Q5.For the following distribution,

    The sum of lower limits of median class and modal class is:

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  • Q6.If the arithmetic mean of x, x+3, x+6, x+9 and x+12 is 10, then x = ?

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  • Q7.If the mean of first n natural numbers is 5n/9 , then n =?

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