Answer:
1. mean = 4 + 6 + 3 + 5
= 15 ÷ 4
mean = 3.75
2. mean = 9 + 3 + 45 + 44 + 57
= 158 ÷ 5
mean = 31.6
3. mean = 52 + 66 + 56 + 51 + 76 + 71 + 66 + 81
= 519 ÷ 8
mean = 64.88
4. mean = 2 + 12 + 13 + 5 + 8
= 40 ÷ 5
mean = 8
5. mean = 2.2 + 2.2 + 2.2 + 2.2 + 4.9 + 5.8 + 4.9
= 24.4 ÷ 7
mean = 3.49
6. mean = 6 + 10 + 12 + 8 + 14
= 50 ÷ 5
mean = 10
7. mean = 40 + 50 + 25 + 30 + 45 + 35
= 225 ÷ 6
mean = 37.5
8. mean = 85 + 80 + 82 + 78 + 75 + 70
= 470 ÷ 6
mean = 78.33
9. mean = 69 + 48 + 78 + 63 + 15 + 87
= 360 ÷ 6
mean = 60
10. mean = 75 + 70 + 65 + 70 + 65 + 79 + 90
= 514 ÷ 7
mean = 73.43
