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(20) Over the past 30 years in the United States there has been a strong positive...

  1. (20) Over the past 30 years in the United States there has been a strong positive correlation between cigarette sales and the number of high school graduates. Draw a diagram of the relationship and identify all variables. This was all the data given, no other information.
Math   Statistics-And-Probability   
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Answer #1

In this question there are two variables . 1st is cigarette sales and 2nd is the number of high school graduates.

Let variable x denote cigarette sales and variable y denoted the number of high school graduate.

As given in the question there has been a strong positive correlation between the cigarette sales and the number of high school graduates.

If variables x and Y have strong positive correlation then the value of correlation coefficient r is greater then 0. That is r > 0.

The following graph shows strong positive correlation between the cigarette sales and the number of high school graduates.

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