QNT 561 Final Exam University of Phoenix New Courses
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15. Kroger, a grocery store chain, wants to identify the ideal store layout for increasing store sales. Because<br />
it primarily uses two store designs, one a grid layout with vertical aisles divided by a center aisle and<br />
another using a traditional straight-aisle pattern, Kroger will match pairs <strong>of</strong> stores that have different<br />
designs but similar shopper demographics and location. Sales from each pair will then be compared to<br />
determine if store design is related to sales. Which type <strong>of</strong> study is this an example <strong>of</strong>?<br />
a) Exploratory study<br />
b) Case study<br />
c) Ex post facto study<br />
d) Longitudinal study<br />
16. Bones Brothers & Associates prepare individual tax returns. Over prior years, Bones Brothers has<br />
maintained careful records regarding the time to prepare a return. The mean time to prepare a return is 90<br />
minutes and the standard deviation <strong>of</strong> this distribution is 14 minutes. Suppose 100 returns from this year<br />
are selected and analyzed regarding the preparation time. What assumption do you need to make about the<br />
shape <strong>of</strong> the population distribution <strong>of</strong> all possible tax preparation times to make inferences about the<br />
mean time to complete a tax form?<br />
a) The population distribution is skewed to the left.<br />
b) The population distribution is skewed to the right.<br />
c) The shape <strong>of</strong> the population distribution does not matter.<br />
d) The population distribution is normal.<br />
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