Q1:
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An apple grower finds that 40 out of 200 of his apples are too small for export. Find a 99% confidence interval for the proportion of fruit that is too small in his whole orchard.
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A. (0.17, 0.23)
B. (0.16, 0.24)
C. (0.14, 0.28)
D. (0.13, 0.27)
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Answer 1:
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Q2:
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What would be the equivalent z-score for a confidence level of 86%? |
A. 1.476
B. 1.47
C. 0.1664
D. 1.664
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Answer 2:
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Q3:
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Find a 86% confidence interval for the proportion of fruit that is too small in the orchard in question 1.
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A. (0.17, 0.23)
B. (0.15, 0.25)
C. (0.16, 0.24)
D. (0.13, 0.27)
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Answer 3:
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Q4:
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A random survey carried out by a bank of their customers' bank accounts found that 134 out of 187 had overdrafts. What proportion is this, rounded to 3 significant figures? |
A. 0.715
B. 0.716
C. 0.717
D. 0.718
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Answer 4:
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Q5:
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Find a 99% confidence interval for the proportion of overdrawn bank accounts at the bank in question 4.
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A. (0.635, 0.805)
B. (0.684, 0.750)
C. (0.685, 0.751)
D. (0.632, 0.801)
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Answer 5:
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