1) The data in the excel file labeled “Decrease LDL” shows the result of administering a new drug to 20 subjects that were diagnosed as having very high LDL Cholesterol level. Dose, in mg, is the explanatory variable and decrease, shows the magnitude of the decrease for the dose shown for that subject, is the response variable.

Use SPSS for all analytic work. Failure to use SPSS where applicable will result in the problem(s) not being graded. :

  • 1) The data in the excel file labeled “Decrease LDL” shows the result of administering a new drug to 20 subjects that were diagnosed as having very high LDL Cholesterol level. Dose, in mg, is the explanatory variable and decrease, shows the magnitude of the decrease for the dose shown for that subject, is the response variable.
  • (10 pts) Make a scatter plot of the data; do not include the regression line and/or equation.
  • (5 pts) What are your observations based on the scatter plot?
  • (5 pts) What is the r value? Comments?
  • (10 pts) Add the least squares regression line and r2 to your scatter plot.
  • (5 pts) What are your thoughts based on the least squares line and r2?
  • (5 pts) If you administer a 10 mg dose what would you expect the decrease in LDL Cholesterol to be?

2. The following table shows the counts for samples of American and East Asian students at a large Midwestern university and the reason they may buy from catalogs. (Excel file is named “HW 2 Reason to buy”.)

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Reason American Asian
Save Time 29 10
Easy 28 11
Low Price 17 34
Live Far From Stores 11 4
No Pressure to Buy 10 3
Other 20 7
  • (15 pts) Make a side by side bar chart to compare the reason for buying using a clustered bar chart. (hint: show percent for each of the groups i.e. American and Asia
  • (10 pts)What conclusions do you have from your side by side chart?

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