Question

Find the variance and standard deviation for the data. 35,45,30,35,40,25

Answer 1

To get the variance we first get the mean as follows .

(35 + 45 + 30 + 35 + 40 + 25)/6 = 35

The Variance :

(35 -35)² + (45 -35)² + 930 -35)² + (35 -35)² + (40 -35)² + (25 - 35)² = 250

250/6 = 41.67

SD = √41.67 = 6.46