Question

I NEED HELP D;
Find the variance and standard deviation.


{3, 3, 4, 5, 5}

Answer 1

first find the mean

Answer 2

mean = (sum of observation)/number of observation
For this problem, its (3+3+4+5+5)/5 = 20 /5 = 4

Answer 3

now, variance is equal to ( sum of (observation - mean )^2 ) / (number of observation - 1)

Answer 4

variance = 1+1+0+1+1 / 4 = 1

Answer 5

deviation = average size of deviation = sqrt 1