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Q1:
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A population has a mean of 85 kg and a standard deviation of 9 kg.
If samples of size 36 are taken, what is the expected value of the sample means?
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A. 9 kg
B. 81 kg
C. 85 kg
D. 9.2 kg |
Answer 1:
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Q2:
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From the population in question 1, what is the standard error of the distribution of sample means? |
A. 1.5 kg
B. 0.25 kg
C. 9 kg
D. 3 kg |
Answer 2:
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Q3:
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If 1000 samples of size 36 were taken from the above population, what shape would the frequency curve of the distribution of sample means be? |
A. triangular
B. rectangular
C. bimodal
D. normal |
Answer 3:
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Q4:
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The mean number of rooms in each house of a city is 8 with a standard deviation of 2.5.
A statistician doing a survey wants to take samples so that the standard deviation of the sample means is 0.08. What should the sample size be?
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A. 977
B. 31
C. 640
D. 20 |
Answer 4:
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Q5:
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In question 4, what would be the expected value of the distribution of sample means? |
A. 64
B. 8
C. 6.25
D. 16 |
Answer 5:
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