Which of the following is correct (within the applied uncertainty)?

a. tLenth,5 = 0.97, and we fail to find significance with α = 0.05 even using IERs.

b. tLenth,5 = 1.37, and we fail to find significance with α = 0.05 even using IERs.

c. tLenth,2 = 4.57, which is significant with α = 0.05, using the IER.

d. Lenth’s PSE = 0.75 (based on the coefficients not effects) and factor x4 is associated with a significant effect using the EER and α = 0.05.

e.

(a) and

(b) are correct.