Pg 144 The practice of Statistics for business and Economics

Pg. 144 The practice of Statistics for business and Economics 3rd ed.

Case Study Exericse 3A.

The coffee data set coffeeexports contains information on the coffee production and exports for 45 coffee-producing countries. The unts are thousands of 60-kilogram bags. The variables are productio in 2008 and 2009 and exports of coffee in 2008 and 2009.

What is the correlation between 2008 production and 2008 export? Make a scatterplot with the least-squares line added for predicting 2008 exports using 2008 production. What does the value of r squared tell you? Identify any unusual values by country name.

With the results from above answer the following additional questions:

Describe what the case is all about and what the statistical issues are.

Describe what statistical techniques, tools or tests you will use to explore the issues.

Summarize the statistical results and make any appropriate conclusions you wish to make.

Solution