Question

R language

Exercise 1. Here, we look at how t critical values behave as their df (degrees of freedom) increases:

a. First, what is z.05?

b. Second, if you look at t.05,20, t.05,40, t.05,60, . . . (t values for α = .05 with df = 20, 40, 60, continuing up by 20 each time)

i. for what df is the value of t.05,df first different from z.05 by less than .05?

ii. for what df is the value of t.05,df first different from z.05 by less than .02?

iii. for what df is the value of t.05,df first different from z.05 by less than .01?

c. What do you think the difference will be between z.05 and t.05,df as df → ∞?

Answer 1

Part (a) :-thank you