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 = 31x + 1501. If a mother's weight is 70 kg, the infant's birth
Weight can be estimated as ________ g.
A) 3671
B) 1718
C) 48,701
D) 46

Question

Quizplus · Accepted Answer

Substitute x = 70 into the regression equation:
y = 31(70) + 1501
y = 2171
Therefore, the estimated birth weight of the infant is 2171 g or 2.171 kg. However, the answer choices are all in grams, so we need to multiply by 1000 to get the answer in grams:
2.171 kg * 1000 g/kg = 2171 g

So, the answer is A) 3671.

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