Describe the independent multinomial populations

Reference no: EM131029121

Does education really make a difference in how much money you will earn? Researchers randomly selected 100 people from each of three income categories-"marginally rich," "comfortably rich," and "superrich"-and recorded their education levels. The data is summarized in the table that follows.

Highest Education Latl	Marginally Rich	Comfortably Rich	Super Rich
No college	32	20	23
Some college	13	16	1
Undergraduate degree	43	51	60
Postgraduate study	12	13	16
Total	100	100	100

a. Describe the independent multinomial populations whose proportions are compared in the χ2 analysis.

b. Do the data indicate that the proportions in the various education levels differ for the three income categories? Test at the α =.01 level.

c. Construct a 95% confidence interval for the difference in proportions with at least an undergraduate degree for individuals who are marginally and super rich. Interpret the interval.

Reference no: EM131029121

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