EASY
Earn 100

In the 'less than' type of ogive  the cumulative frequency is plotted against

50% studentsanswered this correctly

Important Questions on Statistics

EASY
No. of Accidents 0 1 2 3 4 5 6 7
Frequency 36 27 33 29 24 27 18 9

In how many cases 4 or more accidents occur ?

EASY
Find the least positive value of k, if the range of 15,14, k, 25,30,35 is 23.
EASY
As the number of observations and classes increases, the shape of a frequency polygon
HARD

The following distribution gives the daily income of 50 workers of a factory :

120-140
Daily Income (in ) 100-120 140-160 160-180 180-200
Number of workers 12 14 8 6 10

Convert the distribution above to a less than type cumulative frequency distribution and draw its ogive.

EASY
If 65 is the range of the ungrouped data 50, 70, 60, B, 20, 40 then the absolute difference of the possible values of B is
MEDIUM
The difference between upper limit and lower limit of a class is called:
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
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?
EASY
Ogive is graphical representation of _____ in a frequency distribution.
MEDIUM

The following table gives production yield per hectare of wheat of 100 farms of a village

Production yield kg/hec 40-45 45-50 50-55 55-60 60-65 65-70
Number of farms 4 6 16 20 30 24

Change the distribution to a 'more than type' distribution and draw its ogive.

HARD

The marks obtained by 100 students of a class in an examination are given below.

Marks No. of students
0-5 2
5-10 5
10-15 6
15-20 8
20-25 10
25-30 25
30-35 20
35-40 18
40-45 4
45-50 2

Draw a 'less than' type cumulative frequency curves (ogive). Hence find the median.

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 _____.

 

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?