9 15 15 15 16 (five data)
Range = 16 - 9 = 7
Mean = (9 + 15 + 15 + 15 + 16)/5 = 70/5 = 14
So we have:
(9 - 14)2 = (-5)2 = 25 (the square of the difference of data value and the mean value)
(15 - 14)2 = 12 = 1, 3(1) = 3
(16 - 14)2 = 22 = 4,
the sum is 32
The standard deviation = √(32/5) ≈ 2.5
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B because the spread, in this case standard deviation, is larger.
It is 3.045
There are 16 trials.
Standard deviation is the square root of the mean. The mean for this set is (2 + 4 + 3 + 7)/4 = 16/4 = 4; the square root of this is 2.
What Five Numbers have a range of 5 a median of 16 and a mean of 15