A random sample has 49 values. The sample mean is 8.5 and the sample standard deviation is 1.5. Use a level of significance of 0.01 to conduct a left-tailed test of the claim that the population mean is 9.2. a) Is it appropriate to use a Student's t distribution? Explain. How many degrees of freedom do we use? b) What are the hypotheses? c) Compute the t value of the sample test statistic. d) Find the critical value. e) Do we reject or fail to reject 0? f) Interpret