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Q1:
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It is known that in a container of plant bulbs, 45% of them are daffodils. A sample of 40 bulbs is taken from the container. X is a random variable for the number of daffodils.
What type of probability distribution is X?
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A. Binomial
B. Poisson
C. Normal
D. Rectangular
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Answer 1:
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Q2:
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Is the Normal distribution a suitable approximation for X?
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A. Yes
B. No
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Answer 2:
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Q3:
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In question 1, if the normal approximation was used, what would be the mean of the normal approximation? |
A. 22
B. 20
C. 18
D. 5 |
Answer 3:
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Q4:
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In question 1, if the normal distribution was used, what would be the standard deviation of the normal approximation? (to 3 significant figures)
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A. 9.90
B. 3.15
C. 0.450
D. 0.203 |
Answer 4:
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Q5:
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In question 1, what is the probability that there will be more than 20 daffodils? |
A. 0.7947
B. 0.2864
C. 0.2136
D. 0.2053
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Answer 5:
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