Question

A ground frequency table with class intervals of equal sizes using `250-270` (270 not included in this interval) as one of the class interval is constructed for the for the following data
268,220,368,258,242,310,272,342,
310, 290, 300, 320, 319, 304, 402, 318,
406, 292, 354, 278, 210, 240, 330, 3i16,
406, 215, 258, 236.
The frequency of the class 310-330 is
A. 4
B. 5
C. 6
D. 7

Answer 1

Correct Answer - C
Here, we arrange the given data ito groups like `210-230, 230-250,………..390-410.`
(since, our data is from 210-406). The class width in this case is 20.
Now, the given data can be arrange in tabular form as follows.

Hence, the frequency of the class 310-330 is 6.