Question

I need help in this question it is social science statistics

Answer 1

The t distribution is calculated by degrees of freedom and rejection region.

$\alpha\text{ is rejection region and df=n-1}$

a) If alpha is 0.01 and n=20 so df=19, t critical for two tailed test is

$\pm2.860935$

b) If alpha is 0.01 and n=60 so df=59, t critical for one tail test is

$2.391229$

c)If alpha is 0.05 and n=30 so df=29, t critical for two tail test is

$\pm2.04523$

d)If alpha is 0.05 and n=60 so df=59, t critical for one tail test is

$-1.671093$

Option D is correct.