EASY
Earn 100

The height(in cm) of students in a class is given below:

150,151,152,155,164,166,155,156,151,151,157,159,161,168,169,162,163,157,154,

Arrange the data in a frequency distribution table and find the range

Important Questions on Statistics

EASY
In a graphical representation of data, the largest numerical value is 4 the smallest numerical value is 25. If classes desired are 4 then class interval is_____.
MEDIUM
In a frequency distribution, the mid value of a class is 10 and its width is 6, then the lower limit of the class will be
EASY
As the number of observations and classes increases, the shape of a frequency polygon
MEDIUM

Find the mode of the following table :

Class interval 0-10 10-20 20-30 30-40 40-50 50-60
Frequency 9 17 28 23 15 8

 

EASY
Class 0-10 10-20 20-30 30-40 40-50
Frequency 7 15 13 17 10

The cumulative frequency of the class 20-30 of the above frequency distribution is _____.

 

HARD

A survey regarding the heights (in cm) of 51 girls of Class X of a school was conducted and the following data as obtained"

Height in cm Number of girls
Less than 140 4
Less than 145 11
Less than 150 29
Less than 155 40
Less than 160 46
Less than 165 51

Find the median height.

MEDIUM
The following pairs relate to frequency distribution of a discrete variable and its frequency polygon. Which one of the following pairs is not correctly matched?
HARD

Find the median of the following table:

Class interval 0-10 10-20 20-30 30-40 40-50 50-60
Frequency 1 12 24 32 10 5

 

EASY

Find the value of x in following table.

Term Frequency Cumulative Frequency
2 6 6
4 20 26
6 24 50
8 28 x
10 15 93

 

MEDIUM

The table below shows, children of a class sorted according to their marks in an examination.

Marks Number of children
0-10 4
10-20 7
20-30 10
30-40 12
40-50 8
  41

If we arrange the children from the one with the least mark to the one with the greatest, then what will be the assumed mark of the 12th student?

MEDIUM

Wickets taken by many bowlers in international one-day cricket matches are given in the table. Find the mode of the data:

Nos. of Wickets 0-50 50-100 100-150 150-200 200-250 250-300
Nos. of Bowlers 4 5 16 12 3 2

 

MEDIUM

The given table represents the exports (in ₹ crores) of four items A, B, C and D over a period of six years. Study the table and answer the question that follows.

Items 

Year

A B C D
2010 240 128 180 214
2011 250 134 244 282
2012 225 138 230 247
2013 370 169 300 309
2014 425 182 300 275
2015 400 209 306 275

In which year, the exports of item D were 1.4 times the average exports of item B during six years;

MEDIUM

Find the mode of the following data.

Class interval 010 1020 2030 3040 4050 5060
Frequency 4 5 16 12 3 2
EASY

Write mid-value of the following frequency distribution.

Class interval 8-11 12-15 16-19 20-23 24-27 28-31 32-35
Frequency 4 4 5 13 20 14 8

MEDIUM

Find the median of the following table:

Class Interval 0-10 10-20 20-30 30-40 40-50 50-60
Frequency 4 6 10 7 3 2

 

EASY
Find the least positive value of k, if the range of 15,14, k, 25,30,35 is 23.
EASY
What do we call the graph which has been drawn between class interval cumulative frequency.
MEDIUM

The given table represents the exports ( incrores) of four items A, B, C and D over a period of six years. Study the table and answer the question that follows:

Items  A B C D
Years
2010 240 128 180 214
2011 250 134 244 282
2012 225 138 230 247
2013 370 169 340 224
2014 425 182 300 309
2015 400 209 306 275

The total exports of item A from 2012 to 2014 is what percentage less than the total exports of all the four items in 2015:(Correct to one decimal place)

EASY

The following table gives the frequency of vowels used in the page of a book.

Vowels a o
Frequency  75 125 80 70 75
 
As per the given data, which vowels occur less than 80  times?