9.5 is the interquartile range of those numbers.
74
It is just a number after 74 and before 76.
75, which is half way between the two middle numbers.
62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88.60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90
The variance of 73 72 67 74 78 84 79 71 76 76 79 81 75 80 78 76 78 = 16.8456
71 is the median of those numbers.
75
65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80
74
62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77 and 78.
62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77 and 78.
It is just a number after 74 and before 76.
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.
50, 51, 52, 54, 55, 56, 57, 59, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76
60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78
60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80.
75, which is half way between the two middle numbers.