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Author Question: The results of a recent study regarding smoking and three types of illness are shown in the ... (Read 55 times)

Bobvance

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on: Mar 25, 2023

The results of a recent study regarding smoking and three types of illness are shown in the following table.

 

Illness

Non-Smokers

Smokers

Totals

Emphysema

30

90

120

Heart problem

70

210

280

Cancer

100

300

400

Totals

200

600

800


We are interested in determining whether or not illness is independent of smoking.
 

a.State the null and alternative hypotheses to be tested.
b.Show the contingency table of the expected frequencies and determine the test statistic.
c.The null hypothesis is to be tested at 95% confidence.  Determine the critical value for this test.
d.What do you conclude?

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
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Marked as best answer by Bobvance on Mar 25, 2023

studyforce.com

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Reply #1 on: Mar 25, 2023
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Bobvance

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Reply 2 on: Mar 25, 2023
Wow, this really help

jomama

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Reply 3 on: Yesterday
Excellent

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