In an experiment with 15 observations on $x$, then following results were available: $\sum {{x^2}} = 2830$, $\sum x = 170$ One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :

Question

In an experiment with 15 observations on $x$, then following results were available:
$\sum {{x^2}} = 2830$, $\sum x = 170$
One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is :

188.66

177.33

8.33

78.00

Solution

Please login to view the detailed solution steps...

Go to DASH