10th Class Maths MCQ with Answers Chapter 6

Types of dispersion are…………………….

5

8

4

6

The mean of the squared deviations of X observations from their arithmetic mean is called.

Range

Harmonic mean

Variance

Standard deviation

A data in the form of frequency distribution is called.

Grouped data

Ungroup data

None of these

Same

In a set of observation. 5,5,7,9,9,9,9,11,11,11,11,12,12 the mode is:

11

None of these

Both 9 and 11

9

The standard deviation is 6 then its variance is………..

36

6

3

The average pocket money of 30 students is Rs.20/- , The total amount in the class is:

Rs.600/-

Rs.300/-

Rs.30/-

Rs.20/-

If tan ? = ?3 then ? =____________.

60°

45°

30°

90°

Sec²? -tan²? =______________.

sec²?

1

sin²?

cos²?

The sum of 30 observations is 1500. Its average will be:

15

1500

150

None of these

Standard deviation is denoted by

S

X²

S²

x