1. a. Mean = 2
b. Median = 2
c. Mode is 1 and 3
2. a. Mean = 73
Median = 73.5
Mode is 81
b. The mode at 81 would not be very representative of the week's golf.
c. He would need a score of 64 to bring his average down to 72.
3.
(i)

(ii)

(iii)

(iv)


a. median =

6

101

20

20

b. mode =

4

102

20

10

c. mean =

6

100

20

25.2

(v) Because the scores in (iii) 10, 20, 20, 20, 30 are symmetrical, (evenly balanced) the mean and median are the same.
In (iv) the medians are still both 20 but the scores are more spread out.
4. a. Mean = $11.34
b. Median = $12.25
c. She would need to earn $17.30 to bring her average up to $12.00