State a null & alternative hypothesis. Additionally please explain if you’d use a one- or two-sided hypothesis test. Explain your answer. A cluster is an unusual aggregation, real or perceived, of health events that are grouped together in time and space...” (CDC, 1990). A small farming community in Montana believes there is a cluster of brain cancer among young adults (ages 18-30). A member of the community decides to start a study to determine if there is in fact a cluster of brain cancers in Montana. Using data from the U.S. Census and Montana Department of Health, she determines the rate of brain cancer in her community is 16.5 cases per 100,000 individuals. She compares this rate to the national rate of brain cancer among 18-30 year olds, which is 4.7 cases per 100,000 individuals.

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