In reference to Inferential Statistics, for 20 degrees of freedom, the least statistical t-value among the given below is:
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → t (0.05)
Given: Degrees of freedom (df) = 20
The least statistical t-value corresponds to the largest cumulative probability (smallest tail probability).
From t-distribution table for df = 20:
t(0.05) ≈ 1.725
t(0.025) ≈ 2.086
t(0.01) ≈ 2.528
t(0.005) ≈ 2.845
The least t-value is t(0.05) = 1.725