The news story discussed in Case Study 6.5 (pp. 132- 133) was head-lined NIH study finds that
Question:
a. What are the null and alternative hypotheses for this study?
b. The authors concluded that those who drank coffee had a statistically significantly lower risk of death (during the time period of the study) than those who did not. Which type of error, type 1 or type 2, could have been made in making this conclusion?
c. Explain what a type 1 error and a type 2 error would be in this situation. Which one do you think is more serious? Explain.
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