Critical Values of Z = 𝒁𝒂
Test
Two tailed test
Right tailed test
Left tailed test
0.27%
3
3
–3
Level of Significance
1%
2%
2.576
2.326
2.326
2.054
−2.326
−2.054
5%
1.96
1.645
−1.645
t – critical value table
10 %
1.645
1.282
−1.282
F – Critical Value at 5% LOS