Answer:
The mean (average) of a data set is found by adding all numbers in the data set and then dividing by the number of values in the set.
The median is the middle value when a data set is ordered from least to greatest.
The mode is the number that occurs most often in a data set. (Khan, n.d.)
1. Mean: (57+79+83+67+74) ÷ 5 = 72
Median: 57, 67, 74, 79, 83 = 74
Mode: ?
2. Mean: (42+53+41+62+38+49) ÷ 6 = 47.5
Median: 38, 41, 42, 49, 53, 62 = (42+49) = 45.5
Mode: ?
3. Mean: (23+21+20+22+24+19+21+18+21) ÷ 9 = 21
Median: 18, 19, 20, 21, 21, 21, 22, 23, 24 = 21
Mode: 21
