T critical value (one-tailed) = 1.6978. Step 3: Repeat the above step but use the two tailed t table below for two-tailed probability. T critical value (two-tailed +/-) = 2.0428. Use our t table

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Critical T value calculator enables to you to calculate critical value of z and t at one click. You don’t have to look into hundreds of values in t table or a z table because this z critical value