Question

Question 6 (4 marks available)

.
A group of students were given a spelling test.
The table shows their marks.
a) Work out the range of the marks.
b) How many students are in the group?
c) Work out the mean mark of the group.
Represent and Analyse C
Mark
6
7
8
9
10
Frequency
5
4
7
10
4

Answer 1

A) Range = 2

B) 30 Students

C) 8 Marks

Explanation:

A) Range = Biggest - Smallest

Frequency = How many students achieved that many marks

Range = 9-7 = 2

C) Mean = Times the Marks by the Frequencies, add them together, then divide by total frequency (No. of students)

6x5=30

7x4=28

8x7=56

9x10=90

10x4=40

30+28+56+90+40=244

Total Frequency = 30

244/30=8.13

Round to nearest mark = 8

Hope this helped