Standard deviation of data set

Algebra
Tutor: None Selected Time limit: 1 Day

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


78, 90, 456, 676, 111, 381, 21
May 18th, 2015

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


78, 90, 456, 676, 111, 381, 21

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

May 18th, 2015

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