Question: The table below shows the number of cars in millions

The table below shows the number of cars (in millions) sold in the United States for various years and the percent of those cars manufactured by GM.


Use a statistical software package to answer the following questions.
a. Is the number of cars sold directly or indirectly related to GM’s percentage of the market? Draw a scatter diagram to show your conclusion.
b. Determine the correlation coefficient between the two variables. Interpret the value.
c. Is it reasonable to conclude that there is a negative association between the two variables? Use the .01 significance level.
d. How much of the variation in GM’s market share is accounted for by the variation incars sold?


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  • CreatedDecember 10, 2014
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