A random sample had 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 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.

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