EASY
10th ICSE
IMPORTANT
Earn 100

Given, below is a cumulative frequency distribution of 'more than type'.

Marks   Number of students
More than or equal to 60 11
More than or equal to 50 23
More than or equal to 40 43
More than or equal to 30 58
More than or equal to 20 72
More than or equal to 10 82

Change the above data into a continuous grouped frequency distribution.

Important Questions on Statistics

EASY
10th ICSE
IMPORTANT

The number of students absent in a school was recorded everyday 147 for  days and the raw data was presented in the form of the following frequency table.

Number of students Number of days
5 1
6 5
7 11
8 14
9 16
10 13
11 10
12 70
13 4
15 1
18

1

20 1

Find the median of the above data.

MEDIUM
10th ICSE
IMPORTANT

Find the median of the given  frequency distribution.

x 1 2 3 4 5 6 7 8 9 10
y 2 3 6 8 16 12 10 13 9 15
HARD
10th ICSE
IMPORTANT

Calculate the median from the given distribution.

Class 5-10 10-15 15-20 20-25 25-30 30-35 35-40 40-45
frequency 5 6 15 16 5 4 2 2
HARD
10th ICSE
IMPORTANT

The maximum bowling speed (in km/hr )of 33 players at a cricket coaching centre are given below

Speed(in km/hr) 85-100 100-115 115-130 130-145
Number of players 11 9 8 5

Calculate the median bowling speed in km/hr.

HARD
10th ICSE
IMPORTANT

Find the median for the following data.

height(in cm)(less than) 120 140 160 180 200
number of students 12 26 34 40 50

 

HARD
10th ICSE
IMPORTANT

The weights(in kg)of 45 students of a class are given in the following distribution table. Determine the value of weight x(kg) which is such that the number of students having weight less than x kg is same as the number of students having weight more than x kg.

Weight (in kg) Cumulative frequency
Below 45 5
Below 50 11
Below 55 15
Below 60 22
Below 65 38
Below 70 45
HARD
10th ICSE
IMPORTANT

Compute the median marks for the following data.

Marks Number of students
0 and above 50
10 and above 46
20 and above 40
30 and above 20
40 and above 10
50 and above 3
60 and above 0

 

HARD
10th ICSE
IMPORTANT

If the median of the following frequency distribution is 24, then find the missing frequency x.

Age (in years) 0-10 10-20 20-30 30-40 40-50
Number of persons 5 25 x 18 7