Question
Which of the following best describe the significance level=1%? I.The probability of acceptingwhenis false is0.01 II.The probability of rejectingwhenis true is 0.01 III.The probability of
- Which of the following best describe the significance level=1%?
I.The probability of acceptingwhenis false is0.01
II.The probability of rejectingwhenis true is 0.01
III.The probability of failing to rejectwhenis falseis1-0.01=0.99
II only
I and III
I,II,and III
I only
2.A study of 20 professors in a university indicated that the 95% confidence interval for the mean salary of all faculty members in the university is between $68,945 and $81,245. What assumptions must be true for this confidence interval to be valid?
The sample is randomly selectedfrom a population of salaries that is a t-distribution
The distribution of all professors' salaries is approximately normal
The sampling distribution of the sample means is approximately normal
No assumptions are necessary.The Central Limit Theorem applies
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