Statistics and Probability One Mark Questions

10th Standard EM

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Maths

Time : 00:30:00 Hrs
Total Marks : 10
    10 x 1 = 10
  1. Which of the following is not a measure of dispersion?

    (a)

    Range

    (b)

    Standard deviation

    (c)

    Arithmetic mean

    (d)

    Variance

  2. The range of the data 8, 8, 8, 8, 8. . . 8 is

    (a)

    0

    (b)

    1

    (c)

    8

    (d)

    3

  3. The sum of all deviations of the data from its mean is

    (a)

    Always positive

    (b)

    always negative

    (c)

    zero

    (d)

    non-zero integer

  4. A number x is chosen at random from -4, -3, -2, -1, 0, 1, 2, 3, 4 find the probability that |x|≤4

    (a)

    0

    (b)

    1

    (c)

    \(\frac{1}{2}\)

    (d)

    \(\frac{1}{9}\)

  5. which of the following is true?

    (a)

    0≤p(∈)≤1

    (b)

    p(∈)>1

    (c)

    p(∈)<0

    (d)

    \(-\frac { 1 }{ 2 } \ge P(\epsilon )\le \frac { 1 }{ 2 } \)

  6. IF the probability of the non-happening of a event is q, then the probability of happening of that event is 

    (a)

    1-q

    (b)

    q

    (c)

    q/2

    (d)

    ∝q

  7. The mean of first first 10 odd natural number is 

    (a)

    5

    (b)

    10

    (c)

    20

    (d)

    19

  8. The standard deviation is the ____ of variance 

    (a)

    cube

    (b)

    square

    (c)

    square root

    (d)

    cube root

  9. The variance of 5 values is 16. If each value is doubled. them the standard deviation of new values is_______

     

    (a)

    4

    (b)

    8

    (c)

    32

    (d)

    16

  10. The mean of a observation x1, x2, x3, .........xn is \(\bar { x } \). If each observation is multiplied by p, there the mean of the new observations is 

    (a)

    \(\frac { \bar { x } }{ p } \)

    (b)

    p\(\bar { x } \)

    (c)

    \(\bar { x } \)

    (d)

    P+\(\bar { x } \)

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