Question 186797: Please help me with these questions. Thanks
1. If the alternate hypothesis states that does not equal 4,000, what is the rejection region for the hypothesis test? A. Both tails
B. Lower or left tail
C. Upper or right tail
D. Center
E. None of the above
2. If 20 out of 50 students sampled live in a college dormitory, what is the estimated proportion of students at the University living in a dormitory?
A. 0.20
B. 0.40
C. 0.50
D. 0.60
E. None of the above
3. Suppose we are testing the difference between two proportions at the 0.05 level of significance. If the computed z is –1.07, what is our decision?
A. Reject the null hypothesis
B. Do not reject the null hypothesis
C. Take a larger sample
D. Reserve judgment
E. None of the above
The mean gross annual incomes of certified tack welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000. The ship building association wishes to find out whether their tack welders earn more or less than $20,000 annually. The alternate hypothesis is that the mean is not $20,000.
4. If the level of significance is 0.10, what is the decision rule?
A. Do no reject the null hypothesis if computed z lies between –1.65 and +1.65; otherwise, reject it
B.. Do not reject the null hypothesis if computed z is greater than 1.65; otherwise, reject it
C. Do not reject the null hypothesis if computed z lies between
–1.96 and +1.96; otherwise, reject it
D. Reject the null hypothesis if computed z is below –1.96; otherwise, reject it
E. None of the above
5. Which of the following is the alternate hypothesis?
A. $20,000
B. $20,000
C. < $20,000
D. = $20,000
E. = $20,000
6. If the level of significance is 0.10, what is the critical value?
A. 1.65
B. 2.58
C. 1.28
D. 1.28
E. 1.65
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1. If the alternate hypothesis states that does not equal 4,000, what is the rejection region for the hypothesis test?
Ans: A. Both tails
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2. If 20 out of 50 students sampled live in a college dormitory, what is the estimated proportion of students at the University living in a dormitory?
Ans: B) 0.40
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3. Suppose we are testing the difference between two proportions at the 0.05 level of significance. If the computed z is –1.07, what is our decision?
Ans: B) Do not reject the null hypothesis
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The mean gross annual incomes of certified tack welders are normally distributed with the mean of $20,000 and a standard deviation of $2,000. The ship building association wishes to find out whether their tack welders earn more or less than $20,000 annually. The alternate hypothesis is that the mean is not $20,000.
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4. If the level of significance is 0.10, what is the decision rule?
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Ans: A. Do no reject the null hypothesis if computed z lies between –1.65 and +1.65; otherwise, reject it
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5. Which of the following is the alternate hypothesis?
Ans) A) z is not equal to $20,000
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6. If the level of significance is 0.10, what is the critical value?
Ans: A) 1.65
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Cheers,
Stan H.
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