Tail-feather length in birds is sometimes a sexually dimorphic trait. That is, t

Question

Tail-feather length in birds is sometimes a sexually dimorphic trait. That is, the trait differs substantially for males and for females. Researchers studied the relationship between tail-feather length (measuring the R1 central tail feather) and weight in a sample of 20 male long-tailed finches raised in an aviary. The data are represented in the following scatterplot, along with the least-squares regression line equation and the square of the correlation coefficient (R2) 10 70 -28299.3573 R-02133 S0 12 16 18 2022 Bird weight What is the value of the intercept for the male regression line? A. 35.738 B. 2.8299 C. 0.2133 D. No information provided for intercept

Explanation / Answer

a) 2.8299 option B ( the regression equation is given in the image as y=a+bx where a is the intercept and b is the slope)

b) No information available option D(nothing is mentioned about the relation between male and female birds)

c) 21.33% option B ( given in the image)

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