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Answer: 1.733kg
The regression equation is given as: $y_i = \alpha + \beta x_i$ Where: - $y_i$ = dependent variable (foetal weight) - $x_i$ = independent variable (gestation period in weeks) - $\alpha = -4.60$ (y-intercept) - $\beta = 0.2043$ (slope) To estimate the weight at 31 weeks: $y = \alpha + \beta \times x = -4.60 + 0.2043 \times 31$ First calculate: $0.2043 \times 31 = 6.3333$ Then: $-4.60 + 6.3333 = 1.7333$ Therefore, the estimated weight is 1.733 kg.
Author: Nikitesh Somanthe
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Given a regression equation is of the form: where is the dependent variable (foetal weight), is the independent variable (gestation period, in weeks), the y-intercept, and the slope. If and , then estimate the weight of the foetus at exactly 31 weeks.
A
1.533kg
B
1.733kg
C
1.722kg
D
1.8kg
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