From the t-table, read the upper-tail critical value with α = 0.05 and 19 degrees of freedom. Tolerance ±0.001.
From the t-table, read the upper-tail critical value with α = 0.05 and 19 degrees of freedom. Tolerance ±0.001.
Answer
1.729
Cells - t(0.05; 19) · ±0.001 Row df = 19, column α = 0.05: 1.729. This is the multiplier for a 90 % t-interval from n = 20 (5 % in each tail).
IBS1 §8.2 (the t-distribution; Table A12), CC BY 4.0; BCc ch 2 ("an estimated z"); H-W7 (three worked lookups) — shape only