A Denver study looked at the relationship between climate and the age at which infants begin crawling
Question:
A Denver study looked at the relationship between climate and the age at which infants begin crawling [8]. (It was suspected that crawling is delayed when infants wear heavy clothing.) Tables 8.6 shows the average age (in weeks) when children born in different months began crawling and the average Denver temperature for the sixth month after birth.
a. Draw a scatter diagram and the least squares line.
b. What is your dependent variable? Explain your reasoning.
c. Is the estimated slope statistically significant at the 5 percent level?
d. Is the sign of the estimated slope consistent with the researchers’ theory?
e. Is the value of the estimated slope plausible?
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Related Book For
Essential Statistics Regression And Econometrics
ISBN: 9780123822215
1st Edition
Authors: Gary Smith
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