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A random sample of ten measurements were obtained from a normally distributed population with mean / = 6.5. The sample values are X = 4.2 and s = 2. a. Test the null hypothesis that the mean of the population against the alternative hypothesis, p = 6.5. Use a = 0.05. b. Test the null hypothesis that the mean of the population against the alternative hypothesis, u * 6.5. Use a = 0.05