You have survey data from a sample of 20 people. What t critical statistic would you use for a left-tailed test with an alpha of .01?
Round to the third decimal place.
solution
it is left tailed test
n =20
Degrees of freedom = df = n - 1 =20 - 1 = 19
= 0.01
t ,df = t0.01,19 = 2.539 ( using student t table)
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