Illness Non-Smokers Smokers Totals
Emphysema 20 60 80
Heart problem 70 80 150
Cancer 30 40 70
Totals 120 180 300
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.
c. Compute the test statistic.
d. The null hypothesis is to be tested at 95% confidence. Determine the critical value for this test. What do you conclude?
e. Determine the p-value and perform the test.
Recently Asked Questions
- A fillet weld has a throat thickness of 3mm. What is the leg length of the fillet weld?
- A rectangular section 150mm x 75mm (height x width) is welded (all the way around) to a wall and subject to a vertical bending load. In order to calculated the
- For the drawing shown, in which quadrants will the fillet weld be placed? Please explain your reasoning