Answer: (a) 1.721 (b) -0.859074
Step-by-step explanation:
Given : Sample size : n=22
Degree of freedom = [tex]n-1=22-1=21[/tex]
Significance level : [tex]\alpha=0.05[/tex]
(a) By using t-test distribution table, the critical value for t has probability 0.05 to the right of t:-
[tex]t_{n-1,\alpha}=t_{21,0.05}=1.721[/tex]
(b) Similarly, for t has probability 0.8 to the left of t :-
[tex]t_{n-1,\alpha}=t_{21,0.8}=-0.859074[/tex]
