## These data show the ring size for a sample of 8 men 12 10 11.5,11.5, 12, 9, 9 , 11 what is the best approximation of the standard deviation

Question

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## Answers ( No )

Answer:Standard deviation of ring size is 1.253

Step-by-step explanation:We are

given the followingdata-set:12, 10, 11.5, 11.5, 12, 9, 9, 11

n = 8

Formula:

where are data points, is the mean and n is the number of observations.

Sum of squares of differences= 1.5625 + 0.5625 + 0.5625 + 0.5625 + 1.5625 + 3.0625 + 3.0625 + 0.0625 = 11Given the data above N=8

mean is (12+10+11.5+11.5+12+9+9+11)/8

thus, mean = 10.75

Sample standard, s= √(∑(x-m)²)/(n-1)

= 1.172

I therefore, believe that the best approximation of standard deviation is 1.17