Question

Given the following scores on a 30-point quiz, which of the following is an accurate frequency table?

21, 22, 20, 29, 25, 21, 21, 27, 26, 25
Grades
19-21
22-24
25 - 27
28-30
Frequency
4
2
2.
3
Grades
19-21
22 - 24
25 - 27
28-30
Frequency
4
1
4.
1

Answer 1

Table B is accurate

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