Question
3. Insulation workers. Twenty-six cancer deaths were observed in a cohort of 556 insulation workers. Based on national statistics, a cohort of this size and
3. Insulation workers. Twenty-six cancer deaths were observed in a cohort of 556 insulation workers. Based on national statistics, a cohort of this size and age distribution was expected to experience 14.4 incident cases during the observation period. Therefore, under the null hypothesis, p = Po = 14.4/556 = 0.02590. Test whether the observed incidence is significantly greater than expected. Show all hypothesis-testing steps.
Compare the actual cancer deaths for insulation workers to the expected deaths from cancer. Find the Sample Proportion, p-hat = ?
Test to determine if p=hat is significantly different from Po = 0.0259?
State the hypothesis:
Ho: Po = ?
Ha: Po # or > ?
choose your confidence level: ?
Find the significance Level : ?
using Po, find the Standard Error: SE = ?
Find the Zstat value: ?
Using table B, find the corresponding p-value
(do you have to subtract the value in Table B from 1?)
(remember to multiply by the number of tails)
p= ?
Based on "if p < ", would you reject or not reject Ho?
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