Answer:
Rewrite by applying exponent rule :
Apply difference of two squares formula :
Using trig identity
I will attach the formula for the standard deviation.
N = 8
sum of the squared deviations is 184.
standard deviations = square root of 1/N * sum of squared deviation
standard deviation = √(1/8 * 184)
standard deviation = √23
standard deviation = 4.80
The standard deviation of the data set is 4.80
I think it is 2/3X - 44
Hope this helps
4 and 2
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