Use the Distributions tool to find the t values that form the boundaries of the critical region for a two-tailed test with α = .05 for each of the following sample sizes. (Use three decimal places.)   t Distribution Degrees of Freedom = 21         -3.0-2.0-1.00.01.02.03.0x.5000.50000.000   n = 4: t = ±     n = 15: t = ±     n = 24: t = ±

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