Question: A doctor believes that the standard deviation of systolic blood pressure is higher than 450. A random sample of 24 patients found a mean of 132 and a standard deviation of 520. Assuming the variable is normally distributed, test the doctor's claim at the α = 0.01. When answering this problem, don't forget to (a) state H0 and HA, (b) state the critical value or values, (c) compute the test statistic, and (d) make a decision and state your conclusion in the context of the problem.

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