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29 kwi 2022 · Student’s t table is also known as the t table, t-distribution table, t-score table, t-value table, or t-test table. A critical value of t defines the threshold for significance for certain statistical tests and the upper and lower bounds of confidence intervals for certain estimates.
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Critical values of t for two-tailed tests Significance level (a) Degrees of freedom 20 22 23 24 29 30 40 50 60 70 80 100 1000 Infinite 0.2 3.078
"Critical T Values" for Student's T-Test for different confidence levels and degreees of freedom (df):
Statistical Tests for Population Mean (Z-test and T-test) Step 4: Decision Rule a. p-value approach. Compute p-value, Reject H 0 when p-value < α. Type of hypothesis P-value (Z-test) P-value (T-test) Two sided: (Ha: µ ≠ µ 0) p-value = 2 · P( Z | computed z | ) p-value = 2· P( t · | computed t | ) Left sided (Ha: µ < µ 0