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I need help in this question it is social science statistics

I need help in this question it is social science statistics-example-1

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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.

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