Question

In the article “Reproductive Biology of the Aquatic Salamander Amphiuma tridactylum in Louisiana” (Journal of Herpetology [1999]: 100–105), 14 female salamanders were studied. Using regression, the researchers predicted y = clutch size (number of salamander eggs) from x = snout-vent length (in centimeters) as follows: y^ = - 147 1 6.175x For the salamanders in the study, the range of snout-vent lengths was approximately 30 to 70 cm.
a. What is the value of the y intercept of the leastsquares line? What is the value of the slope of the least-squares line? Interpret the slope in the context of this problem.
b. Would you be reluctant to predict the clutch size when snout-vent length is 22 cm? Explain.


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  • CreatedSeptember 19, 2015
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