Radioactive fallout from testing atomic bombs drifted across a region. There were 230 people in the region at the time and 42 of them eventually died of cancer. Cancer experts estimate that one would expect only about 29 deaths in a group this size. Assume the sample is a typical group of people.
The null and alternative hypotheses are
Ho: p = 0.1261
Ha: p > 0.1261
1. Determine the z-test statistic.
2. What is the P-Value?
3. Is the observed death rate unusually high?
4. Does this prove that exposure to radiation increases the risk of cancer?