A regression of birth weight on the mothers’ estriol level is shown below: Birth

ID: 3323557 • Letter: A

Question

A regression of birth weight on the mothers’ estriol level is shown below:

Birth weight (g) = 2149 + 0.61*(estriol level). Which of the following is FALSE?

a. It is estimated that for every additional unit of estriol level, the baby’s birth weight increases by about 0.6.

b. It is estimated that for the person with zero estriol level, the baby’s birth weight is about 2149 g.

c. If one mother’s estriol level is 15 mg/24hr, then it is estimated that baby’s birth weight is about 2158 g.

d. If one baby’s birth weight is 2153 g, then this equation indicates that this mother’s estriol level is about 5.8 mg/24hr.

e. One baby’s birth weight is 2900 g and the mother’s estriol level is 10. Its residual is about 1.

a. It is estimated that for every additional unit of estriol level, the baby’s birth weight increases by about 0.6.

b. It is estimated that for the person with zero estriol level, the baby’s birth weight is about 2149 g.

c. If one mother’s estriol level is 15 mg/24hr, then it is estimated that baby’s birth weight is about 2158 g.

d. If one baby’s birth weight is 2153 g, then this equation indicates that this mother’s estriol level is about 5.8 mg/24hr.

e. One baby’s birth weight is 2900 g and the mother’s estriol level is 10. Its residual is about 1.

Birth weight (g) = 2149 + 0.61*(estriol level)

If one mother’s estriol level is 15 mg/24hr then Birth weight is 2149+0.61*15=2158 so C is true. A and B are also true from the equation

D is incorrect as we are trying to predict birth weight

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