Question

The marks of 30 students of a class, obtained in a test (out of 75), are given below:
42, 21, 50, 37, 42, 37, 38, 42, 49, 52, 38, 53, 57, 47, 29
59, 61, 33, 17, 17, 39, 44, 42, 39, 14, 7, 27, 19, 54, 51.
Form a frequency table with equal class intervals. (Hint : one of them being 0-10)

Answer 1

Given the marks of 30 students of a

class , obtained in a test ( out of 75 ),

We have taken class interval 10 .

first class interval 0 - 10.

See the attachment.

••••

Answer 2

Answer:

The frequency table is shown below.

Step-by-step explanation:

The given data set is

42, 21, 50, 37, 42, 37, 38, 42, 49, 52, 38, 53, 57, 47, 29, 59, 61, 33, 17, 17, 39, 44, 42, 39, 14, 7, 27, 19, 54, 51.

We need to form a frequency table with equal class intervals.

Interval                  Data elements                                Frequency

0-10                         7                                                        1

11-20                    14, 17, 17, 19                                          4

21-30                   21, 27, 29                                             3

31-40                   33, 37, 37, 38, 38, 39, 39                    7

41-50                   42, 42, 42, 42, 44, 47, 49, 50             8

51-60                   51, 52, 53, 54, 57, 59                          6

61-70                     61                                                        1

You can also use tally marks instead of Data elements.