SOLUTION: Find the critical t-value that corresponds to 99% confidence. Assume 19 degrees of freedom.
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Question 1155616: Find the critical t-value that corresponds to 99% confidence. Assume 19 degrees of freedom.
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Use a t table such as this one
http://www.ttable.org/
which can be found in the back of statistics textbooks. At the bottom of the table, it shows 99% confidence interval. Highlight the entire column. Then highlight the entire row with df = 19, where df stands for "degrees of freedom"
This diagram shows what I mean
The row and column intersect at the value 2.861
This means, P( -2.861 < T < 2.861 ) = 0.99
Answer: 2.861
This value is approximate
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