Hi im having some trouble with these 2 problems. 11 a. I am not sure if there is a accurate anser needed for this question but still would like to hear what will be the ideal answer for this. 11 b. I said y=202.53+1.4gx 11 c. I said "around 47% of the dots are around the regression line. 11 d. I said "the value of correlation between calories and sodium is moderate. 11 e. I said "the prediction is not reliable.
12 a. I said "No because there is a leftover curved pattern. 12 b. I said "It means when using the lease square regression line with x to predict y will typically be off by about 23. 12 c. I said "-1.993, for every lunch, it will be decreased by -1.993 12 d. I said -57.9.
Please correct them and provide me what I SHOULD have said
For $(c)$ the usual "interpretation" is that about $47\%$ of the variability in the level of sodium is "explained" by the variability in calories. The other $53\%$ is variability in the residuals.
In $(d)$, possibly the request for a comment on the reliability could be satisfied by a prediction interval or the like. Formulas for these are found in most textbooks.