What is the standard deviation of the following data set rounded to the nearest tenth?

229.1

find the mean of the data= 1813/7=259

find the difference between each value and the mean= 181, 169, 197, 417, 148, 122, 238

square each difference= 32,761, 28,561,38,809,173,889,21,904, 14,884, 56,644

Add each of the squares and find the mean= 367,452/7=52,493

the square root of 52,493= 229.11

standard deviation= 229.11

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