Question

Determine the critical t-scores for each of the conditions below. a) one-tail test, a=0.01, and n=18 b) one-tail test, c = 0.005, and n = 40 c) two-tail test, a = 0.02, and n=22 d) two-tail test, a 0.05, and n=25 Click here to view page 1 of the Student's t-distribution table. Click here to view page 2 of the Student's t-distribution table.

Answer 1

a)

df = n-1 = 18-1 = 17

ta,df = +0.01,17 = 2.5669 b) df = n -1 = 40 – 1= 39 ta,df = t0.005,39 = 2.7079 df = n-1= 22 - 1 = 21 a 0.02 = 0.01 2 ta/2,df = 10.01,21 = t - value(two-tailed) : +/- 2.8314 df = n-1 = 25 – 1= 24 å 0.05 2 = 3 = 0.025 ta/2,df = +0.025,24 = t - value(two-tailed) : +/- 2.3909