0.05 is to _____ as 0.01 is to _____.

a. ± 1.96; ± 2.58
b. ± 2.58; ± 1.96
c. ± 2.33; ± 1.64
d. one-tailed test of significance; two-tailed test of significance
e. Both b) and c) are correct.


Ans: a

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