The Jefferson valley bank claims that the variation of their wait time is less when using a single line that feeds three tellers as opposed to having threes peerage lines. Test the claim that the standard deviation for wait time is less than 1.9 minutes with a single feed line at alpha=0.05 for the following sample of customers wait times in minutes and write your conclusion. Values are 6.5 6.6 6.7 6.8 7.1 7.3 7.4 7.7. 7.7 7.7
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