Question
Beryllium disease: Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause
Beryllium disease:Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal). The results were as follows:
Duration of Exposure<
1
1
to<
5
5
Diseased12
14
23
Sensitized12
18
12
Normal64
130
205
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Test the hypothesis of independence. Use the
=
0.01
level of significance and theP
-value method with the TI-84
Plus calculator. What do you conclude?
Part:0 / 4
0 of 4 Parts Complete
Part 1 of 4
(a) State the null and alternate hypotheses.
H
0
: Beryllium exposure and disease status
(Choose one)
independent.
H
1
: Beryllium exposure and disease status
(Choose one)
independent.
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