Testing to see if there is evidence that the mean service time at Restaurant #1 is less

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Testing to see if there is evidence that the mean service time at Restaurant #1 is less than the mean service time at Restaurant #2. Use Figure 4.4 and assume that the sample sizes are all the same. Sample means are shown with circles on the boxplots.

Figure 4.4

20 15 - 10 - Group 2 2 Sample A Sample B Sample C Sample D


A situation is described for a statistical test and some hypothetical sample results are given. In each case:
(a) State which of the possible sample results provides the most significant evidence for the claim.
(b) State which (if any) of the possible results provide no evidence for the claim.

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Statistics, Enhanced Unlocking The Power Of Data

ISBN: 9781119308843

2nd Edition

Authors: Robin H Lock, Patti Frazer Lock, Kari Lock Morgan, Eric F Lock, Dennis F Lock

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