SOLUTION: What is the variance of the following data? If necessary, round your answer to two decimal places. 48, 65, 57, 54, 61, 57, 52, 61, 57

Algebra ->  Probability-and-statistics -> SOLUTION: What is the variance of the following data? If necessary, round your answer to two decimal places. 48, 65, 57, 54, 61, 57, 52, 61, 57       Log On


   

Question 602833: What is the variance of the following data? If necessary, round your answer to two decimal places.
48, 65, 57, 54, 61, 57, 52, 61, 57
Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!
48, 65, 57, 54, 61, 57, 52, 61, 57
      x          x²
     48        2304  
     65        4225
     57        3249
     54        2916
     61        3721
     57        3249
     52        2704
     61        3721
     57        3249
sum%28x%29=512 sum%28x%5E2%29=29338 


s² = 1%2F%28n-1%29%28sum%28x%5E2%29-expr%281%2Fn%29%2A%28sum%28x%29%29%5E2%29 = 1%2F%289-1%29%2829338-expr%281%2F9%29%2A%28512%29%5E2%29 = 1%2F8%2829338-expr%281%2F9%29%2A262144%29 = 949%2F36 = 26.36111111

Edwin