Method Of Finding Value from TTable

For a study involving one population and a sample size of 18 (assuming you have aÂ tdistribution), what row of theÂ ttable will you use to find the righttail (â€śgreater thanâ€ť) probability affiliated with the study results?
Answer:Â dfÂ = 17
The study involving one population and a sample size of 18 hasÂ nÂ â€“ 1 = 18 â€“ 1 = 17 degrees of freedom.

For a study involving a paired design with a total of 44 observations, with the results assuming aÂ tdistribution, what row of the table will you use to find the probability affiliated with the study results?
A matchedpairs design with 44 total observations has 22 pairs. The degrees of freedom is one less than the number of pairs:Â nÂ â€“ 1 = 22 â€“ 1 = 21.

AÂ tvalue of 2.35, from aÂ tdistribution with 14 degrees of freedom, has an uppertail (â€śgreater thanâ€ť) probability between which two values on theÂ ttable?
Answer:Â 0.025 and 0.01
Using theÂ ttable, locate the row with 14 degrees of freedom and look for 2.35. However, this exact value doesnâ€™t lie in this row, so look for the values on either side of it: 2.14479 and 2.62449. The uppertail probabilities appear in the column headings; the column heading for 2.14479 is 0.025, and the column heading for 2.62449 is 0.01.
Hence, the uppertail probability for aÂ tvalue of 2.35 must lie between 0.025 and 0.01.