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A doctor believes that the standard deviation of systolic blood pressure is 450. A random sample of 24 patients found a standard deviation of 520.

A doctor believes that the standard deviation of systolic blood pressure is 450.  A random sample of 24 patients found a standard deviation of 520.  Assume the variable is normally distributed and  = 0.01. What are the critical values?
A) 10.196 and 41.638 C) 9.262 and 44.181
B) 9.886 and 45.559 D) 10.856 and 42.980

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