Concept explainers
For Exercises 1 through 7, do a complete
a. Draw the
b. Compute the value of the
c. Test the significance of the correlation coefficient at α = 0.01, using Table I.
d. Determine the regression line equation if r is significant.
e. Plot the regression line on the scatter plot, if appropriate.
f. Predict y′ for a specific value of x, if appropriate.
Sections 10–1 and 10–2
2. Deaths from Lightning NOAA keeps track of not only deaths from lightning each year but also the circumstances under which those deaths occur. Listed below are the number of deaths from lightning other than when standing under a tree and the number that occurred when the victim was under a tree, for a random selection of years. Is there a linear relationship between the variables?
Find y′ when x = 10.
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Elementary Statistics: A Step By Step Approach
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