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1. Correlation is useful only for:
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2. Which of the following are considered numerical summary measures?
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3. One characteristic of “paired variables” is that:
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4. A line or curve superimposed on a scatterplot to quantify an apparent relationship is known as a(n):
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A recent survey in Michigan revealed that 60% of the vehicles traveling on highways, where speed limits are posted at 70 miles per hour, were exceeding the limit. Suppose you randomly record the speeds of ten vehicles traveling on US 131 where the speed limit is 70 miles per hour. Let X denote the number of vehicles that were exceeding the limit. |
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5. probability distribution of X is
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6. The P(X = 10).is a. 0.003 b. 0.006 c. 0.112 d. 0.175 |
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7. The P(4 < X < 9) is a. 0.235 b. 0.025 c. 0.788 d. 0.450 |
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8. The P(X = 2) is a. 0.01 b. 0.11 c. 0.21 d. 0.35 |
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9. The P(3X6) is 0.215 0.607 0.005 0.425 |
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10. If the random variable X is exponentially distributed with parameter = 3, then P(X 2) , up to 4 decimal places, is:
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11. If the random variable X is exponentially distributed with parameter = 1.5, then P(2X 4), up to 4 decimal places, is:
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12. The Poisson and exponential distributions are commonly used in:
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13. Which distribution is best-suited to measure the length of time between arrivals at a grocery checkout counter?
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14. If the mean of an exponential distribution is 2, then the value of the parameter is:
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15. The tool that provides useful information about a data set by breaking it down into categories is the:
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16. The tables of counts that result from pivot tables are often called:
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17. The four areas of a pivot table are:
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18. Changing the location of fields in a pivot table is known as:
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A large retailer has purchased 10,000 DVDs. The retailer is assured by the supplier that the shipment contains no more than 1% defective DVDs (according to agreed specifications). To check the supplier’s claim, the retailer randomly selects 100 DVDs and finds six of the 100 to be defective. |
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19. (A) Assuming the supplier’s claim is true, the mean and the standard deviation of the number of defective DVDs in the sample respectively are: a. 2, 0.75 b. 1, 0.995 c. 1, 0.75
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20. A Poisson distribution is:
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21. The Poisson random variable is a:
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22. Which probability distribution applies to the number of events occurring within a specified period of time or space?
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23. If the random variable X is exponentially distributed with parameter = 3, then P(X 2) , up to 4 decimal places, is:
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The possible annual percentage return of the stocks of Gamma, Inc. and Delta, Inc. share a common probability distribution, given below.
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24. The expected annual return of each stock are: 12.58 and 11.65 10.58 and 10.10 10.25 and 10.10 14.75 and 10.75 the annual returns of these two stocks positively associated with each other. the annual returns of these two stocks negatively associated with each other the annual returns of these two stocks not related with each other the annual returns of these two stocks perfectly associated with each other |
