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Use the following sample sizes and numbers of successes for the next six questions. Medical researchers reviewing the risk of death for elderly patients taking dementia drugs found the following data. Assume a 05 significance level for testing the claim that the proportions are not equal. Also, assume the two simple random samples are independent. Show your work. Dementia Drugs Placebo Number of Patients 500 450 Total Deaths 23 12 Do the following: 1. Identify the null hypothesis and the alternative hypothesis. 2. What is the equation you would use to find the test statistic? Plug in the numbers but do not solve. Round each number in your formula to three decimal places