ENMA 420(520) Quiz 1 (with solutions) 2009 09 07

# ENMA 420(520 Quiz - ENMA 420/530 Quiz to edit Master subtitle style Click 1 Review 11 General Comments Overall great work Combinations and

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Click to edit Master subtitle style 10/17/09 ENMA 420/530 Quiz 1 Review 11

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10/17/09 General Comments Overall, great work! Combinations and permutations are the most significant areas needing work Good trend on presentation Think about conciseness, too TRY! Can’t give partial credit for an absent 22
10/17/09 Overview Mean: 92.51% StDev: 6.18% 33 Mean: 96.14% StDev: 3.13% 420 : 520 :

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10/17/09 Problem 1 The data set NUCLEAR provides the number of active nuclear power plants in a sample of 20 states. a. Find the mean, median and mode of this data set. b. Repeat part a without the largest value from the data set. Discuss the differences. c. Arrange the 20 values from lowest to 44
10/17/09 Problem 1 (Cont’d) 55

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10/17/09 Problem 1 (Cont’d) 66
10/17/09 Problem 1 (Cont’d) 77 The trimmed mean has the advantage (or disadvantage) that some possible outliers have been eliminated – but this is done without determining if they actually are.

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10/17/09 Problem 2 The following table provides a breakdown of sheet steel usage in a
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## This note was uploaded on 10/17/2009 for the course MET 387 taught by Professor Dean during the Spring '09 term at Old Dominion.

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ENMA 420(520 Quiz - ENMA 420/530 Quiz to edit Master subtitle style Click 1 Review 11 General Comments Overall great work Combinations and

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