Add all together = 15
Divide by the number of numbers in the sample, in this case 5 = 3
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The average of 1/2 and 1/4 is the average of 2/4 and 1/4 which is the average of 4/8 and 2/8 which is 3/8
Average(1, 3, 2, 0.81) = (1 + 3 + 2 + 0.81)/4 = 6.81/4 = 1.7025
The average of 3 numbers is their sum divided by the number of data in the data set (in this case 3). 2+-3+-4=-5. Their average is 5/3, or 1 2/3, or 1.6666666 with the 6 repeating.
2
The data {1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 6, 7} has: Median: Thee are 16 data items, so the median is the mean average of the middle two, ie the 8th and 9th numbers: median is (3 + 3) / 2 = 3 Mean: (1 + 1 + 2 + 2 + 2 + 3 + 3 + 3 + 3 + 4 + 4 + 4 + 5 + 5 + 6 + 7) ÷ 16 = 55 ÷ 16 = 37/16 = 3.4375