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HomeWork_10

# HomeWork_10 - Survey Result(Observed Clients Client’s...

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Home Work 10 1. A multinomial experiment with k = 3 cells and n = 320 produced the data shown in the following one-way table. Do these data provide sufficient evi- dence to contradict the null hypothesis that p 1 = 0.25 , p 2 = 0.25 , and p 3 = 0.50 ? Test using α = 0.05. Cell 1 2 3 n i 78 60 182 2. A large brokerage firm wants to determine whether the service it provides to affluent clients differs from the service it provides to lower-income clients. A sample of 500 clients are selected, and each client is asked to rate his or her broker. The results are shown in Table below
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Unformatted text preview: Survey Result (Observed Clients) Client’s Income Under \$30,000 \$30,000-\$60,000 Over \$60,000 Totals Broker Rating Outstandin g Average Poor 48 98 30 64 120 33 41 50 16 153 268 79 Totals 176 217 107 500 a. Test to determine whether there is evidence that broker rating and customer income are independent. Use a α = .10. b. Plot the data and describe the patterns revealed. Is the result of the test supported by the plot? 1...
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