Regression Stats

Question 1

Standard Dev

Answer 1

s = Square root (SSE/n-2)

Question 2

SE for sampling dist.

Answer 2

s / square root of sum of squared differences

Question 3

standard error of fit

Answer 3

s times the square root of (1/n + (x0-x bar)^2/sum of squared differences)

Question 4

Margin of error for prediction interval

Answer 4

t * square root (s^2 + se(fit)^2)