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Statistics Test - 1

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Statistics Test - 1
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  • Question 1
    1 / -0

    The statistical method which helps us to estimate or predict the unknown value of one variable from the known value of the related variable is called

    Solution

    Explanation:

    It follows from the definition of regression

     

  • Question 2
    1 / -0

    The Mode of the following items is 0,1,6,7,2,3,7,6,6,2,6,0,5,6,0.

    Solution

    Explanation:

    6 is the most frequent value here.

     

  • Question 3
    1 / -0

    Which one of the following average is most affected of extreme observations ?

    Solution

    Explanation:

    As A/M is calculated as the sum of all the observations divided by number of observations, so it is affected by if there is any change in the outliers

     

  • Question 4
    1 / -0

    For a moderately skewed distribution, quartile deviation and the standard deviation are related by

    Solution

    Explanation:

    its a standard result

     

  • Question 5
    1 / -0

    The two lines of regression are x + 4y = 3 and 3x +y = 15 . value of x for y = 3 is

    Solution

    Explanation:

    we have x + 4y = 3 and 3x + y = 15 as the lines of regression of y on x and x on y respectively. 

    therfore, for y = 3 the required line is x on y

    so put y= 3 in 3x + y = 15

    we get, x = 4

     

  • Question 6
    1 / -0

    A batsman scores runs in 10 innings as 38,70,48,34,42,55,63,46,54 and 44 , then the mean score is

    Solution

    Explanation:

    Mean (x)

    = (38+70+48+34+42+55+63+46+54+44)/10

    = 494/10

    = 49.4

     

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