Perform a test of hypothesis for an unknown population mean of a normal distribution with a population variance of 16 at a 10% level of significance. Consider the pair of hypotheses, Ho:mean=60 vs. Ha:mean>60 Let Z(0.90) be approximately 1.282 and Z(0.95) approximately 1.645. A sample mean of 62 with a sample size of 13 was obtained. Which statement is correct? The test statistic is (62-60)/sqrt(4/13) The test statistic is (62-60)/(16/13) The test statistic is (62-60)/sqrt(16/13)
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