A hypothesis will be used to test that a population mean equals 7 against the alternative that the population mean does not equa
l 7 with unknown variance. What are the critical values for the test statistic T0 for the following significance levels and sample sizes?
(a) ? = 0.01 and n = 20 (b) ? = 0.05 and n = 12 (c) ? = 0.10 and n = 15
(a) ? = 0.01 and n = 20 (b) ? = 0.05 and n = 12 (c) ? = 0.10 and n = 15
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