9th maths statics

1) The ratio of the sum of observations and the total number of observations is called:

• Mean

• Median

• Mode

• Central tendency

2) The mean of x+2, x+3, x+4 and x-2 is:

• a. (x+7)/4

• b. (2x+7)/4

• c. (3x+7)/4

• d. (4x+7)/4

3) The median of the data: 4, 6, 8, 9, 11 is

• 6

• 8

• 9

• 11

4) The median of the data: 155 160 145 149 150 147 152 144 148 is

• 149

• 150

• 147

• 144

5) The median of the data: 17, 2, 7, 27, 15, 5, 14, 8, 10, 24, 48, 10, 8, 7, 18, 28 is:

• 10

• 24

• 12

• 8

6) The mode of the given data: 4, 6, 5, 9, 3, 2, 7, 7, 6, 5, 4, 9, 10, 10, 3, 4, 7, 6, 9, 9 is;

• 7

• 9

• 10

• 6

7) The value which appears very frequently in a data is called:

• mean

• median

• mode

• central tendency

8) The collection of information, collected for a purpose is called:

• mean

• median

• mode

• data

9) The mean of the data 2, 3, 4, 5, 0, 1, 3, 3, 4, 3 is

• 2

• 2.2

• 2.4

• 2.8

10) Which of the following is not a measure of central tendency?

• Standard deviation

• Mean

• Median

• Mode