Midterm 1 (Fall 2004)

# Midterm 1 (Fall 2004) - The probability that B occurs is.6...

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Statistics Test 1 Prof. VanderHoff FALL 2003 All work must be shown on exam to receive credit. 1. [10] Calculate the statistics below using the following data from a sample: 8 4 7 2 1 4 5 7 -1 3 Mean: Median Mode Range Variance Standard deviation Coeffcient of variation 2. [10] Calculate the grade point average using the following data: Grade credits 4 20 3 30 2 20 1 5 0 5 3. [10] Calculate the mathematical expectation:

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Value Probability 10 0.1 20 0.4 30 0.2 40 0.3 4. [10] The average time it takes to travel from here to there is 30 minutes. The standard deviation is 5 minutes. About 68% of trips take within what range of times? About 95% of trips take within what range of times?
5. [15] calculate the statistics below using the following data from a sample: Mean: Median Mode Range Standard deviation 6. [10] the probability that A occurs is .4.
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Unformatted text preview: The probability that B occurs is .6. The probability that A and b occur is .3. Are A and B independent? 7. [10]. A jar holds 10 red marbles, 10 white marbles and 5 blue marbles. What is the probability of picking 2 red marbles? What is the probability of picking a red marble and a blue marble? 8. [10] Is time or money more variable? Why? Time money Mean 100 50 Standard deviation 9 6 9. [10]. The probability that U find parking is .3. The probability that I find parking is .3. The probability that U and I both find parking is .1. What is the probability that U or I find parking? 10. [5] What is the z score for x=20, when the mean of x=15 and the standard deviation of x = 5? 11. Calculate the covarian...
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Midterm 1 (Fall 2004) - The probability that B occurs is.6...

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