#### Statistics and Probability One Mark Questions

10th Standard EM

Reg.No. :
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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+$\bar { x }$