# The table below shows the number of cars (in millions) sold in the United States for various

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## Question:

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.

Year | Cars Sold (millions) | Percent GM | Year | Cars Sold (millions) | Percent GM | ||||

1950 | 6.0 | 50.2 | 1985 | 15.4 | 40.1 | ||||

1955 | 7.8 | 50.4 | 1990 | 13.5 | 36.0 | ||||

1960 | 7.3 | 44.0 | 1995 | 15.5 | 31.7 | ||||

1965 | 10.3 | 49.9 | 2000 | 17.4 | 28.6 | ||||

1970 | 10.1 | 39.5 | 2005 | 16.9 | 26.9 | ||||

1975 | 10.8 | 43.1 | 2010 | 11.6 | 19.1 | ||||

1980 | 11.5 | 44.0 | 2015 | 17.5 | 17.6 | ||||

**Requirements **

Determine the correlation coefficient between the two variables

State the decision rule for 0.01 significance level: *H*_{0}: *ρ* ≥ 0; *H*_{1}: *ρ* < 0. Reject H0 if t

**Related Book For**

## Statistical Techniques in Business and Economics

ISBN: 978-0078020520

16th edition

Authors: Douglas Lind, William Marchal