SSLC Maths English Medium - Statistics One Mark Questions Online Test

Maths - Statistics

Maths - Statistics

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1. The range of the first 10 prime numbers 2, 3, 5, 7, 11, 13, 17, 19, 23 , 29 is
   1.   28
   2.   26
   3.   29
   4.   27
2. The least value in a collection of data is 14.1. If the range of the collection is 28.4, then the greatest value of the collection is
   1.   42 . 5
   2.   43 . 5
   3.   42 .4
   4.   42 .1
3. The greatest value of a collection of data is 72 and the least value is 28.Then the coefficient of range is
   1.   44
   2.   0.72
   3.   0 .44
   4.   0. 28
4. For a collection of 11 items, ∑x = 132, then the arithmetic mean i
   1.   11
   2.   12
   3.   14
   4.   13
5. For any collection of n items,∑ (x -x̄ ) =
   1.   ∑x
   2.   x̄
   3.   nx̄
   4.   0
6. For any collection of n items, (∑x) - x̄ =
   1.   nx̄
   2.   ( n - 2) x̄
   3.   (n - 1) x̄
   4.   0
7. If t is the standard deviation of x, y. z, then the standard deviation of x + 5, y + 5, z + 5 is
   1.   t/3
   2.   t + 5
   3.   t
   4.   x y z
8. If the standard deviation of a set of data is 1.6, then the variance is
   1.   0 . 4
   2.   2 . 56
   3.   1 . 96
   4.   0 . 04
9. If the variance of a data is 12.25, then the S.D is
   1.   3 . 5
   2.   3
   3.   2 . 5
   4.   3 . 25
10. Variance of the first 11 natural numbers is
    1.   √5
    2.   √10
    3.   5√2
    4.   10
11. The variance of 10, 10, 10, 10, 10 is
    1.   10
    2.   √10
    3.   5
    4.   0
12. If the variance of 14, 18, 22, 26, 30 is 32, then the variance of 28, 36,44,52,60 is
    1.   64
    2.   128
    3.   32√2
    4.   32
13. Standard deviation of a collection of data is 2√2 . If each value is multiplied by 3,then the standard deviation of the new data is
    1.   √12
    2.   4√2
    3.   6√2
    4.   9√2
14. Given ∑(x - x̄)² = 48 , x̄ = 20 , and n = 12 The coefficient of variation is
    1.   25
    2.   20
    3.   30
    4.   10
15. Mean and standard deviation of a data are 48 and 12 respectively. The coefficient of variation is
    1.   42
    2.   25
    3.   28
    4.   48