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.