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Use the Student's t distribution to find tc for a 0.95 confidence level when the sample...

Use the Student's t distribution to find tc for a 0.95 confidence level when the sample is 21. (Round your answer to three decimal places.)

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Solution:

We have to use  the Student's t distribution to find tc for a 0.95 confidence level when the sample is 21.

for c = 0.95, two tail area = 1 - c = 1 -0.95 = 0.05

df = degrees of freedom = n - 1= 21 - 1 = 20

So look in t table for df = 20 and two tail area = 0.05 and find corresponding t critical value.

From above t table , we get: t = 2.086

Thus tc = 2.086

milcah answered 1 year ago
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