Advertisements
Advertisements
Question
Find the actual lower and upper-class limits and also the class marks of the classes:
1.1 - 2.0, 2.1 -3.0 and 3.1 - 4.0.
Advertisements
Solution
In the case of frequency 1.1 - 2.0 the lower-class limit is 1.05, upper-class limit is 2.05 and classmark.
is 1.05 - 2.05
`(1.05 + 2.05)/(2)`
= `3.10/2`
= 1.55
In the case of frequency 2.1 - 3.0 the lower-class limit is 2.05, upper-class limit is 3.05 and classmark.
is 2.05 - 3.05
`(2.1 + 3.0)/(2)`
= `5.10/2`
= 2.55
In the case of frequency 3.1 - 4.0 the lower class limit is 3.05, the upper class limit is 4.05 and classmark.
is 3.05 - 4.05
`(3.1 + 4.0)/(2)`
= `7.10/2`
= 3.55
APPEARS IN
RELATED QUESTIONS
Find the actual lower class limits, upper-class limits and the mid-values of the classes:
10 - 19, 20 - 29, 30 - 39 and 40 - 49.
Fill in the blank :
The range of data 7, 13, 6, 25, 18, 20, 16 is ............
Fill in the blank :
The class mark of class interval 22 - 29 is ...........
Fill in the blank:
The upper limit of 5-12.5 is ………
Fill in the blank:
If the upper and the lower limits of a class interval are 16 and 10; the class-interval is ……..
Find the actual (or true) lower and upper class limits and class-marks (or mid values) of the following classes: 2.1 - 4.0, 4.1 - 6.0 and 6.1 - 8.0.
The number of goals scored by Arsenal Football Club in the English Premier League in the season 2007 were:
1, 2, 1, 3, 2, 5, 1, 6, 4, 4, 2, 3, 5, 6, 4, 2, 2, 3, 4, 1, 0, 5, 0, 5, 3, 2, 3, 4, 4, 1, 1, 2, 4, 3. 1. 4
Arrange these data in a distance frequency distribution table and answer the following:
(i) What is the range of the number of goals scored by AFC?
(ii) How many times did AFC score 3 or more than 3 goals?
(iii) Which variatie has the highest frequency?
If the class intervals of a frequency distribution are 5 - 12, 13 - 20, 21 - 28, 29 - 36, 37 - 44, 45 - 52 and 53 - 60, find the following:
(i) The class limits and class boundaries of 21 - 28
(ii) The class size and the class mark of the class interval 45 - 52.
(iii) Find the true class limits of all the class intervals.
The class marks of a frequency distribution are: 15, 25, 35, 45, 55, 65 and 75. Determine the class limits.
The class marks of a frequency distribution are: 27, 32, 37, 42, 47, 52, 57, 62, 67, 72 and 77. Find the class size and true class limits.
