Author Question: The results of a recent study regarding smoking and three types of illness are shown in the ... (Read 23 times)

Bobvance · **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?

studyforce.com · **Reply #1 on:** Mar 25, 2023

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