Calculating Statistics Answers

1.a. The mean of the scores is 14.
b. The median of the scores is 15.
c. The mode score is 15.
d. The range of the scores is 9.

2. a. The mean number of goals scored is 52.1.

b. The median number of goals scored is 52.

c. The mode of these scores is 52.

 Y7_Calculating_Statistics_ex_01.gif

 

3.a. The mean = 73.1, the median = 74, the modes = 65 and 74

b. The lower of the two modes would not be very representative of the scores.

c. A score of 62 would be needed to reduce his mean score to 72.

 Y7_Calculating_Statistics_ex_02.gif

4.

 
a. median
b. mode
c. mean
d. range
(i)
20
20
26
20
(ii)
103
132
119.1
103
(iii)
6
2,6 and 9
5.3
8

 

5.

a. Her mean weekly pay was $48.84.

b. Her median pay was $50.05.

c. She would have to earn $59.30 to raise her average weekly earnings to $50.

6.a. Y7_Calculating_Statistics_answers_01.gif

b. Range = 97 − 23 = 74

c. The median is 63.5.