Determine the critical values for the following tests of the population mean with an unknown population standard deviation. The analysis is based on 30 observations drawn from a normally distributed population at a 1% level of significance. Use Table 2. (Negative values should be indicated by a minus sign. Round your answers to 3 decimal places.) Critical Value a. H0: ? ? 41 versus HA: ? > 41 b. H0: ? = 14.0 versus HA: ? ? 14.0 ? c. H0: ? ? 4.2 versus HA: ? < 4.2 d. H0: ? = 16 versus HA: ? ? 16 ?
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