A study based on a sample of 13 participants calculates a value of 2.26 for the t-test for a single mean. For alpha (α) = .05 (two-tailed), which of the following is the correct way to present this analysis?
A) t(11) = 2.26, p

Question

A study based on a sample of 13 participants calculates a value of 2.26 for the t-test for a single mean. For alpha (α) = .05 (two-tailed), which of the following is the correct way to present this analysis?
A) t(11) = 2.26, p < .05
B) t(12) = 2.26, p < .05
C) t(12) = 2.26, p < .01
D) t(13) = 2.26, p < .01

Quizplus · Accepted Answer

The degree of freedom for a t-test is calculated by subtracting 1 from the sample size (n-1). Therefore, for a sample size of 13, the degree of freedom would be 13-1 = 12.

Option A is incorrect as the degree of freedom should be 12 instead of 11. 
Option C is incorrect as the p-value is less than .05 (not < .01). 
Option D is incorrect as the sample size is 13, not 12.

Therefore, the correct way to present this analysis is B: t(12) = 2.26, p < .05.

A Study Based on a Sample of 13 Participants Calculates