Answer:
Table B is accurate
Step-by-step explanation:
Given
Observations: 21, 22, 20, 29, 25, 21, 21, 27, 26, 25
Required
An accurate frequency table
From both tables in the attachment; both tables use a grouped data to represent the grades.
The grouped data is as follows;
19-21
22-24
25 - 27
28-30
Breaking down these groups into bits:
19-21
:- 19, 20, 21
22-24
:- 22, 23, 24
25 - 27
:- 25, 26, 27
28-30:- 28, 29, 30
Looking up these values in the given data, we have
19-21
:- 21, 20, 21, 21
22-24
:- 22
25 - 27
:- 25, 27, 26, 25
28-30:- 29
Getting their frequencies
19-21
:- 4
22-24
:- 1
25 - 27
:- 4
28-30:- 1
Hence, the second table is accurate
