In an investigation of environmental causes of disease, data were collected on the annual mortality rate (deaths
Question:
a) Describe what you see in this scatterplot, in context.
b) Here is the regression analysis of Mortality and Calcium concentration. What is the regression equation?
Dependent variable is Mortality
R-squared = 43%
s = 143.0
c) Interpret the slope and y-intercept of the line, in context.
d) The largest residual, with a value of -348.6, is for the town of Exeter. Explain what this value means.
e) The hardness of Derby's municipal water is about 100 ppm of calcium. Use this equation to predict the mortality rate in Derby.
f) Explain the meaning of R-squared in this situation.
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Related Book For
Stats Data And Models
ISBN: 662
4th Edition
Authors: Richard D. De Veaux, Paul D. Velleman, David E. Bock
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