Assume that the data has a normal distribution and the number of observations is greater than...
Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Round to two decimal places. α = 0.025 for a left-tailed test.
Homework Answers
P(z<-1.96) = 0.025
The probability z less than -1.96 is 2.5%
So the critical value for a one tail test with α = 0.025 is -1.96
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Assume that the data has a normal distribution and the number of
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d.f. not in the Student's t table, use
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some situations, this choice of d.f. may increase
the P-value by a small amount and therefore produce a
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