Chapter 3 Quiz

Chapter 3 Quiz -...

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_________________. absolute deviation interquartile range coefficient of variation z  score correlation coefficient The empirical rule says that approximately what percentage of the values would be  within 2 standard deviations of the mean in a bell shaped set of data? 68% 50% 97.7% 100% 95% Manuel Banales, Marketing Director of Plano Power Plants, Inc.'s Electrical Division, is  leading a study to assess the relative importance of product features. Two items on a  survey questionnaire distributed to 100 of Plano's customers asked them to rate the  importance of "ease of maintenance" and "efficiency of operation" on a scale of 1 to 10  (with 1 meaning "not important" and 10 meaning "highly important"). His staff  assembled the following statistics on these two items. Ease of Maintenance Efficiency of Operation Mean 7.5 6.0 Median 8.5 5.5 Mode 9.0 4.5 Standard Deviation 1.5 2.5 What can Manuel conclude from these statistics? The Ease of Maintenance distribution is not skewed.
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Chapter 3 Quiz -...

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