Cerebral blood flow (CBF) in the brains of healthy people is normally distributed with a mean of 73. A random sample of 25 stroke patients resulted in an average CBF of x = 69.9 with a standard deviation of s = 12. Test the hypothesis that the average CBF for strok patients is different from that of healthy people using a = 0.05. State the null and alternative hypotheses. A USE SALT O Ho: H < 73 versus H u= 73 O Ho: u = 73 versus H: H = 73 O Họi u < 73 versus H: u > 73 O Hại H= 73 versus H u< 73 O Ho: H = 73 versus H: u = 73 State the test statistic. (Round your answer to three decimal places.) State the rejection region. (If the test is one-tailed, enter NONE for the unused region. Round your answers to three decimal places.) t> State the conclusion. O H, is not rejected. There is sufficient evidence to conclude that the average CBF for stroke patients is different from 73. O H, is rejected. There is insufficient evidence to conclude that the average CBF for stroke patients is different from 73. O H, is rejected. There is sufficient evidence to conclude that the average CBF for stroke patients is different from 73. O H, is not rejected. There is insufficient evidence to conclude that the average CBF for stroke patients different from 73.

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