What is Zα/2 for a 90% confidence interval of the population mean? Group of answer choices...
What is Zα/2 for a 90% confidence interval of the population mean? Group of answer choices 0.49 1.96 0.48 1.645
Homework Answers
Solution :
At 90% confidence level the z is ,
= 1 - 90% = 1 - 0.90 = 0.10
/ 2 = 0.10 / 2 = 0.05
Z/2
= Z 0.05 = 1.645
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