Question

The standard deviation is the quadratic mean of what? 5. 6. What do we get if we multiply the average squared deviations by the sample size? 7-9 is the correlation coefficient? Show all your work (Three questions - Thirty points) There are two variables "spiders in your house" (X) and "ants in your house" (Y). What X Y 2 7 15 11 13 11 11 14 10 20 4

Answer 1

6)we know that average squared deviation is equal to the ratio of squared deviation and sample size

i.e.

average squared deviation = ( sum of squared deviation)/sample size

if we multiply the average squared deviation by sample size, then we get only sum of squared deviation

Sum of squared deviation is called as sum of squares or SS