Analysis of the data from 25 mothers indicates that an infant's birth weight (g), y , can be estimated by a mother's weight ( kg), x , using the regression equation y=31 x+1501 . For every _______ kg increase in a mother's weight, the infant's birth weight increases by _______g.
A) 31 ; 1501
B) 1 ; 31
C) 31 ; 1
D) 1501 ; 31

Question

Analysis of the data from 25 mothers indicates that an infant's birth weight  (g), y , can be estimated by a mother's weight ( kg),  x , using the regression equation  y=31 x+1501 . For every _______ kg  increase in a mother's weight, the infant's birth weight increases by _______g.
A)  31 ; 1501 
B)  1 ; 31 
C)  31 ; 1 
D)  1501 ; 31

Quizplus · Accepted Answer

The coefficient of x (31) represents the increase in the dependent variable (y, infant's birth weight) for every one unit increase in the independent variable (x, mother's weight). Therefore, for every 1 kg increase in a mother's weight, the infant's birth weight increases by 31 g.

Analysis of the Data from 25 Mothers Indicates That an Infant's