9 icse statistics

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

• 6

• 8

• 9

• 11

The ratio of the sum of observations and the total number of observation is called

• Mean

• Median

• Mode

• Central tendency

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

• (x+7)/4

• (2x+7)/4

• (3x+7)/4

• (4x+7)/4

The median of the data 155,160,145,149,150,147,152,144,148 is

• 149

• 150

• 147

• 144

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

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

• 2

• 2.2

• 2.4

• 2.8

The class marks of a frquency distribution are given as follows:

15,20,25......

The class corresponding to class mark 15 is

• 12.5-17.5

• 17.5-22.5

• 18.5-21.5

• 19.5-20.5

The mean of 5 numbers is 30. If one number is excluded their mean becomes 28. The excluded number is

• 28

• 30

• 35

• 38

The median of the data 78, 56, 22, 34, 45, 54, 39, 68,54,84 is

• 45

• 49.5

• 54

• 56

In the class intervals 10-20, 20-30 the number 20 is included in

• 10-20

• 20-30

• Both the intervals

• None