Second frank Look again at Exercise 17s regression output for the calorie and sodium content of hot dogs. a) The output reports s = 59.66. Explain what that means in this context. b) Whats the value of the standard error of the slope of the regression line? c) Explain what that means in this context.

SE(X) measures how close the sample AVG is likely to be to the true population AVG ● What’s the problem here –SE(X) depends on population SD –we don’t know population SD ● How could you approximate the populaUse() ̂ (called “hat”) means estimate or predicted () () = √ Confidence Interval (CI): a range of values (%) that catches the average/mean of the population Margin of Error Margin of Error Interpretation of Confidence Interval: __% of all samples will