Question

use first chart for 21-26

Question 21 5 pts Greene & Touchstone conducted a study to relate birth weight to the estriol levels from 24-hour urine specimens taken from pregnant women who are near term. The test can provide indirect evidence of an abnormally small fetus. The scatter plot of the data is shown below. We want to perform a statistical test to find linear relationship between birth weight and estriol levels. Linear regression result shows that y = 21.52 + 0.608x best fits the data with R2 -0.34457 (please use this information to answer questions 21 through 26). 45- A 40 o birth weight O B / O C. Olo o o O O

Answer 1

Que.21

Since slope coefficient is positive, hence

Correct linear regression line is D.

Que.22

Residual is defined as e = y - 21.52 -0.608 x

Que.23

Since slope coefficient is positive,

There is somewhat a positive linear relationship between birth weight and estriol levels.

Que.24

Variance of birth weight can be somewhat explained by estriol levels.

Que.25

F test

Que.26

The slope of the regression line is not significantly different than 0 with $\alpha$ = 0.001