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Determine the critical value or values for a one-meanz -test at the20% significance level if the hypothesis test is left-tailed (H a : < 0
Determine the critical value or values for a one-meanz
-test at the20%
significance level if the hypothesis test isleft-tailed(H
a
:<
0
).
z
0.8
0.842
z
0.4
0.253
z
0.2
0.842
z
0.1
1.282
z
0.05
1.645
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