Question

Rakesh measured the height of students in his class and made a grouped frequency table of the data. The mid values of the class intervals that he made were 122, 126, 130, 134, 138 and 142. Which of these could be one of the class intervals that he made?
(Note: The mid value of a class interval = (upper class limit + lower class limit) / 2)
1 125 - 130
2 125 - 135
3 126 - 130
4 128 - 132

Answer 1

Answer:

option (4)

Step-by-step explanation:

the values given indicate the class marks... So the difference between two class marks is of 4 so if we subtract 2 from 122 and add 2 to 122 then it will be 120-124 and this is the class interval. So the class intervals are as follows

120-124

124-128

128-132

132-136

136-140

140-144

this type of class interval is called inclusive/continuous form of data... So only option 4 is there that is representing the correct class interval.

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