Maurice Tutor

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Category > Computer Science Posted 19 Sep 2017 My Price 4.00

independent lines

 

Testing the variance (left-tailed test)

For years, a large discount store has used independent lines to check out customers. Historically, the standard deviation of waiting times is 7 minutes. The manager tried a new, single-line procedure. A random sample of 25 customers using the single-line procedure was monitored, and it was found that the standard deviation for waiting times was only s = 5  minutes. Use α = 0.05to test the claim that the variance in waiting times is reduced for the single-line method. Assume the waiting times are normally distributed.

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Maurice Tutor
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Status NEW Posted 19 Sep 2017 11:09 AM My Price 4.00

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