Answer: 1%
Step-by-step explanation:
Given that :
Degree of freedom (df) = 21
What proportion of the area under the curve lies to the left of t = -2.518?
Using the online t value calculator :
P(t ≤ - 2.518) = 0.01
Hence, proportion of area under the curve which lies to the left of - 2.518 with degree of freedom (df = 21) is 0.01 = 1%
