A) Suppose that the mean and standard deviation of the scores ona statistics exam are 89.2 and 6.49, respectively, and areapproximately normally distributed. Calculate the proportion ofscores below 77.
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| 3) | We do not have enough information to calculate the value. |
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B)
When students use the bus from their dorms, they have an averagecommute time of 8.974 minutes with standard deviation 3.1959minutes. Approximately 66.9% of students reported a commute timeless than how many minutes? Assume the distribution isapproximately normal.
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| 4) | We do not have enough information to calculate the value. |
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C)
The revenue of 200 companies is plotted and found to follow abell curve. The mean is $637.485 million with a standard deviationof $27.6736 million. Would it be unusual for a randomly selectedcompany to have a revenue above $687.08 million?
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| 2) | We do not have enough information to determine if the value isunusual. |
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| 3) | The value is not unusual. |
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| 4) | It is impossible for this value to occur with this distributionof data. |
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| 5) | The value is borderline unusual. |
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