87
86.90909090 recurring or 86 and one eleventh.
It is the middle value which is 81
69, 78, 79, 88, 88, 88, 92, 93, 95, 98, 100 The mean is 88. The mode is 88. The range is 31.
765
For 98 78 86 88 84 81 93 92 89 and 81: σ=6.2361
No number appears more than all others, but 85, 86 and 96 all appear twice, and so they can all be said to be the mode.
No number appears more than any other, but 80 and 93 both appear twice, so they both could be said to be the mode.
69, 78, 79, 88, 88, 92, 93, 95, 98, 100 The median is 90. The mode is 88. The mean is 88.
The mean, or average, of 75, 82, 93, and 86 is 84.
78
84
87
86.90909090 recurring or 86 and one eleventh.
It is the middle value which is 81
85
52