Assignment:
Question 1: Before the change of ownership, the company was encouraging its customers to reduce private labeling as a way to reduce cost of goods sold. Explore the distribution of customers by company sales. Does the distribution of customers (private label, brand label, or both) differ from what one would expect by chance?
1.Run a chi square goodness of fit using purchase type as the variable with "all categories equal".
2.Report the observed and expected values and the tests of statistical significance.
Question 2: Run a chi square goodness of fit using purchase type as the variable with "all categories unequal" for the expected value.
1. Run a chi square goodness of fit using purchase type as the variable with 12, 26, and 12 as the expected values.
2. Report the observed and expected values and the tests of statistical significance.
Question 3: Is there a relationship between the type of purchasing and the structure of procurement?
1. Run chi-square independence test (crosstabs) using type of purchasing in the rows and structure of procurement in the column.
2. Use the chi square and the phi coefficient to evaluate the relationship and statistical significance.
3. Report the observed and expected values and the tests of statistical significance.