A)$4,500 B)$1,700 C)$1,000 D)$2,500 41. Maintaining the gains that have been mad
ID: 2955448 • Letter: A
Question
A)$4,500
B)$1,700
C)$1,000
D)$2,500
41. Maintaining the gains that have been made witharevised process in the long term by avoiding potentialproblemsthat can occur when a process is changed involves whichpart of theDMAIC process?
A)Define
B)Measure
C)Analyze
D)Improve
E)Control
42. TABLE 11-3
A realtor wants to compare the average sales-to-appraisal ratiosofresidential properties sold in four neighborhoods (A, B, C, andD).Four properties are randomly selected from each neighborhoodandthe ratios recorded for each, as shown below.
A: 1.2, 1.1, 0.9, 0.4 C: 1.0, 1.5, 1.1, 1.3
B: 2.5, 2.1, 1.9, 1.6 D: 0.8, 1.3, 1.1, 0.7
Interpret the results of the analysis summarized in thefollowingtable:
Referring to Table 11-3, the within-group mean squares is
A)0.29.
B)0.10.
C)1.18.
D)1.06.
43. TABLE 12-7
The director of transportation of a large company is interestedinthe usage of her van pool. She considers her routes to bedividedinto local and non-local. She is particularly interestedinlearning if there is a difference in the proportion of malesandfemales who use the local routes. She takes a sample of aday'sriders and finds the following:
She will use this information to perform a chi-squarehypothesistest using a level of significance of 0.05.
Referring to Table 12-7, the director now wants to know iftheproportion of users who are male and the proportion of userswhouse the local routes are the same. Which test should sheuse?
A)2-testfor difference in proportions
B)Wilcoxonrank sum test
C)McNemartest for difference in proportions
D)Z-testfor difference in proportions
44. The coefficient of determination(r2)tells us
A)theproportion of total variation that is explained.
B)whetherr has any significance.
C)thatwe should not partition the total variation.
D)thatthe coefficient of correlation (r) is larger than1.
Explanation / Answer
40.C) $1,000 41.D) Improve 42.D) 1.06. 43.A) 2-test for difference inproportions 44.A) the proportion of total variation that is explained.
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