#### Descriptive Statistics and Probability One Mark Questions

11th Standard

Reg.No. :
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Time : 00:30:00 Hrs
Total Marks : 10
10 x 1 = 10
1. Which of the following is positional measure?

(a)

Range

(b)

Mode

(c)

Mean deviation

(d)

Percentiles

2. When calculating the average growth of economy, the correct mean to use is?

(a)

Weighted mean

(b)

Arithmetic mean

(c)

Geometric mean

(d)

Harmonic mean

3. When an observation in the data is zero, then its geometric mean is

(a)

Negative

(b)

Positive

(c)

Zero

(d)

Cannot be calculated

4. The correct relationship among A.M.,G.M.and H.M.is:

(a)

A.M.<G.M.<H.M.

(b)

G.M.≥A.M.≥H.M.

(c)

H.M.≥G.M.≥A.M.

(d)

A.M.≥G.M.≥H.M.

5. Harmonic mean is the reciprocal of

(a)

Median of the values.

(b)

Geometric mean of the values.

(c)

Arithmetic mean of the reciprocal of the values.

(d)

Quartiles of the values.

6. Median is same as

(a)

Q1

(b)

Q2

(c)

Q3

(d)

D2

7. The median of 10,14,11,9,8,12,6 is

(a)

10

(b)

12

(c)

14

(d)

9

8. The mean of the values 11,12,13,14 and 15 is

(a)

15

(b)

11

(c)

12.5

(d)

13

9. If the mean of 1,2,3,.......n is$\frac { 6n }{ 11 }$, then the value of n is

(a)

10

(b)

12

(c)

11

(d)

13

10. Harmonic mean is better than other means if the data are for

(a)

Speed or rates.

(b)

Heights or lengths.

(c)

Binary values like 0 and 1.

(d)

Ratios or proportions.