Question

What's the sample variance and the standard deviation from the data set: 2, 9 , 10 ?

Answer 1

use the formulas/processes

Answer 2

you need to find the mean, and then the sum of the squared differences from the mean, and divide it according to yor degrees of freedom

Answer 3

after you find variance, stndrd dev is just the sqrt of variance

Answer 4

mean = 7
sum of squared differences= 38
then 38/2= 19
19 = sample variance

square root of 19 = 4.36
standard deviation = 4.36

Answer 5

i think that's right, thank you!