We want to test whether proportions of cancer differ between a group exposed to estrogen (Group1)...

We want to test whether proportions of cancer differ between a group exposed to estrogen (Group1) and a placebo group (Group2) (two-sided). Let n1=8506 and n2=8102. After a five year follow up, Group 1 had 751 incidents while the Group 2 had 623 incidents.

State null and alternative hypotheses.

Calculate the proportions of incidents in both samples combined, π^. (Report up to 4 decimal places.)

Compute the test statistics, Z. (Round up to 2 decimal places).

Compute the p-value (two-sided).

Can you reject H0 at α=0.05?

What can you conclude?

A. The (population) proportion of cancer significantly differ between two groups at 95% confidence level.

B. The (population) proportion of cancer does not significantly differ between two groups at 95% confidence level.

Expert Solution

Correct option : A. The (population) proportion of cancer significantly differ between two groups at 95% confidence level.

orchestra answered 1 year ago

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We want to test whether proportions of cancer differ between a group exposed to estrogen (Group1)...

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