For a two-tailed test with variance unknown, n=19, and a=0.05, what is the critical value?
This corresponds to a two-tailed test, for which a t-test for one mean, with unknown population standard deviation, using the sample standard deviation, will be used.
Based on the information provided, the significance level isย "\\alpha = 0.05,"ย "df=n-1=18"ย and the critical value for a two-tailed test isย "t_c = 2.100922."
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