Worksheet for calculating mean, median, and mode with five data sets and an answer table.

- Mean: The average, calculated by summing all numbers and dividing by the count.
- Median: The middle value when the numbers are ordered from least to greatest. If there is an even number of values, it is the average of the two middle numbers.
- Mode: The number that appears most frequently. If no number repeats, there is no mode.

1) 78, 66, 64, 72, 81, 77, 65, 66
- Mean: (78 + 66 + 64 + 72 + 81 + 77 + 65 + 66) / 8 = 569 / 8 = 71.125
- Ordered: 64, 65, 66, 66, 72, 77, 78, 81 → Median: (66 + 72) / 2 = 69
- Mode: 66 (appears twice)

2) 73, 56, 63, 55, 57, 46, 63
- Mean: (73 + 56 + 63 + 55 + 57 + 46 + 63) / 7 = 413 / 7 = 59
- Ordered: 46, 55, 56, 57, 63, 63, 73 → Median: 57
- Mode: 63 (appears twice)

3) 34, 47, 42, 50, 48, 34, 36, 46
- Mean: (34 + 47 + 42 + 50 + 48 + 34 + 36 + 46) / 8 = 337 / 8 = 42.125
- Ordered: 34, 34, 36, 42, 46, 47, 48, 50 → Median: (42 + 46) / 2 = 44
- Mode: 34 (appears twice)

4) 85, 81, 78, 78, 78
- Mean: (85 + 81 + 78 + 78 + 78) / 5 = 400 / 5 = 80
- Ordered: 78, 78, 78, 81, 85 → Median: 78
- Mode: 78 (appears three times)

5) 61, 47, 55, 57, 58, 47, 59, 63
- Mean: (61 + 47 + 55 + 57 + 58 + 47 + 59 + 63) / 8 = 447 / 8 = 55.875
- Ordered: 47, 47, 55, 57, 58, 59, 61, 63 → Median: (57 + 58) / 2 = 57.5
- Mode: 47 (appears twice)

Answers:
| | Mean | Median | Mode |
|---|---------|--------|------|
| 1 | 71.125 | 69 | 66 |
| 2 | 59 | 57 | 63 |
| 3 | 42.125 | 44 | 34 |
| 4 | 80 | 78 | 78 |
| 5 | 55.875 | 57.5 | 47 |