Interpretation: Test of Homogeneity Consider Zane’s study regarding products recycled and age group (see Problem 5). Suppose he found a sample x 2 516.83.

(a) How many degrees of freedom are used? Recall that there were 4 age groups and 3 products specified. Approximate the P-value and conclude the test at the 1% level of significance. Does it appear that the proportion of people who recycle each of the specified products differ by age group?

Explain.

(b) From this study, can Zane identify how the different age groups differ regarding the proportion of those recycling the specified product? Explain.

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