Lori Franz, maintenance supervisor for the Baltimore Transit Authority, would like to determine whether there is a
Question:
a. Plot a scatter diagram.
b. What kind of relationship exists between these two variables?
c. Compute the correlation coefficient.
d. Determine the least squares line.
e. Test for the significance of the slope coefficient at the .05 significance level. Is the correlation significant? Explain.
f. Forecast the annual maintenance cost for a five-year-old bus.
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