It is 73.5 which is the number halfway between the two middle values.
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Mean simply means average. To find the average of a set of numbers, simply add them all together and then divide by the amount of numbers you added. 72 + 73 + 74 + 75 + 76 = 370 370 ÷ 5 = 74. The mean of {72, 73, 74, 75, 76} is 74, which is also the median.
71 is the median of those numbers.
Listing the 47 numbers in increasing value, the 23rd, 24th, 25th, and 26th numbers are 73. There are 22 scores higher and 22 scores lower, making 73 the median.
71 72 73 74 75 76 77 78 79
Add up the numbers which comes to 971 Then divide by the number of items in the list (=13) which gives 74.692 So your answer is 74.692