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Statistics Test - 29
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Statistics Test - 29
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  • Question 1/10
    4 / -1
    The class marks of a distribution are 6, 10, 14, 18, 22, 26, 30 then the class size is
  • Question 2/10
    4 / -1
    The reciprocal of the mean of the reciprocals of n observations is their
  • Question 3/10
    4 / -1
    The mean weight per student in a group of seven students is 55 kg. If the individual weights of 6 students are 52, 58, 55, 53, 56 and 54; then weights of the seventh student is
    Solutions

  • Question 4/10
    4 / -1
    If the algebraic sum of deviations of 20 observations from 30 is 20, then the mean of observations is
    Solutions

  • Question 5/10
    4 / -1
    The weighted mean of first n natural numbers whose weights are equal to the squares of corresponding numbers is
    Solutions

  • Question 6/10
    4 / -1

    Solutions

  • Question 7/10
    4 / -1
    The number of observations in a group is 40. If the average of first 10 is 4.5 and that of the remaining 30 is 3.5, then the average of the whole group is
    Solutions

  • Question 8/10
    4 / -1
    A student obtain 75%, 80% and 85% in three subjects. If the marks of another subject are added, then his average cannot be less than
    Solutions

  • Question 9/10
    4 / -1
    The average marks of boys in a class is 52 and that of girls is 42. The average marks of boys and girls combined is 50. The percentage of boys in the class is
    Solutions

  • Question 10/10
    4 / -1
    The A.M. of a 50 set of numbers is 38. If two numbers of the set, namely 55 and 45 are discarded, the A.M. of the remaining set of numbers is
    Solutions

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