The weights of newborns at a hospital have an average of 7 lb and an SD of 1.2 lb. The average head circumference of the newborns is 14 inches and the SD is 0.5 inches. The correlation between the two variables is 0.55 and the scatter diagram is football shaped. The regression line for estimating head circumference based on weight is drawn on the scatter diagram, with weight on the horizontal axis.

1.For about 50% of the newborns, the regression estimate of head circumference based on weight is correct to within _____________ inches.

Question

The weights of newborns at a hospital have an average of 7 lb and an SD of 1.2 lb. The average head circumference of the newborns is 14 inches and the SD is 0.5 inches. The correlation between the two variables is 0.55 and the scatter diagram is football shaped. The regression line for estimating head circumference based on weight is drawn on the scatter diagram, with weight on the horizontal axis.

1.For about 50% of the newborns, the regression estimate of head circumference based on weight is correct to within _____________ inches.

anonymous · Answer

2.For about what percent of the newborns does the regression line overestimate head circumference by more than 0.5 inches?

anonymous · Answer

3.Of the newborns who weigh 8 pounds, about what percent have head circumferences larger than 15 inches?

kropot72 · Answer

http://openstudy.com/study#/updates/514ab833e4b07974555d91f5

anonymous · Answer

what is this?|dw:1363862779998:dw|

anonymous · Answer

Problem 2B is There is a non-linear relation between the two variables in the regression. 
Problem 2C is The regression looks OK. 
Problem 2 A can some one tell answear please

anonymous · Answer

who knows the answear help

anonymous · Answer

for 2A its no non linear relation

anonymous · Answer

what are the answers for 2D and 2E?
please help