You are performing a two-tailed test. If α = .004 , find the positive critical value, to three decimal places. zα/2 =
You are performing a left-tailed z-test
If α=.025, and your test statistic is z=−1.75, do you:
Solution:
= 0.004
/ 2 = 0.004 / 2 = 0.002
Z/2 = Z0.002 = 2.878
positive critical value = 2.878
= 0.025
z = -1.75
P(z < -1.75) = 0.0401
P-value = 2 * 0.0401 = 0.0802
P-value >
Fail to Reject Null Hypothesis
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