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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Enter the significance level alpha (α is a number between 0 and 1) Click the Calculate button to calculate the Student's t-critical value. Online T-Value Calculator. Degrees of Freedom (df):

t = [x – μ] / [s / √ (n)]In this equation: μ is the population mean, x is the mean of the sample, s is the standard deviation of the sample, and. n is the size of the sample. Critical value calculator

When conducting a hypothesis test, you can use the T value to compare against a T score that you’ve calculated. The easiest way to get the T value is by using

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