Questions 8-13 refer to the (incomplete) grouped frequency distribution below which depicts the mass (in
kilograms) of 25 kittens and cats at a veterinarian.
Mass (kg)
Number of cats (f)
Midpoint
fm
fm2
(m)
0<2
3
1
3
3
2<4
6
3
18
54
4<6
10
5
50
250
6<8
4
7
28
196
8<10
2
9
18
162
S
25
-
A
B
QUESTION 8
The values of A and B, respectively, are:
A. 117 and 13689
171 and 665
117 and 655
117 and 665
QUESTION 9
A kitten is regarded as having a mass under 2 kg. What is the percentage of kittens in this sample?
A. 12%
18%
36%
6%
QUESTION 10
The estimated mean (in kg) is:
A. 4.24
4.68
5.10
3.96
QUESTION 11
The median (in kg) is:
A. 4.50
4.90
4.70
4.30
(4 Marks)
(4 Marks)
(4 Marks)
(4 Marks)