In general terms, for a two-tailed case, the critical values correspond to two points to the left and right of the center of the distribution, that have the property that the sum of the area under the
critical region: [cdft,d-1(1-α), ∞) Critical values for two-tailed t-test: ±cdft,d-1(1-α/2) critical region: (-∞, -cdft,d-1(1-α/2)] ∪ [cdft,d-1(1-α/2), ∞) To decide the fate of the null hypothesis, just check if your t-score lies within the critical
Find the t critical value if size of the sample is 5 and significance level is 0.05. Solution: Step 1: Subtract 1 from the sample size to get the degree of freedom. Degree of Freedom = N – 1 = 5 –
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