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Home Q & A Board Science-Related Homework Help Mathematics Statistics and Probability
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Acostak1 Acostak1
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6 years ago
With individual lines at the checkouts, a store manager finds that the standard deviation for the waiting times on Monday mornings is 5.2 minutes.
 
  After switching to a single waiting line, he finds that for a random sample of 29 customers, the waiting times have a standard deviation of 4.2 minutes. Use a 0.025 significance level to test the claim that with a single line, waiting times vary less than with individual lines.
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#1
6 years ago
Test statistic: X2 = 18.266. Critical value: X2 = 15.308. Fail to reject . There is not sufficient evidence to support the claim that with a single line waiting times have a smaller standard deviation.
Acostak1 Author
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#2
6 years ago
Thank you for helping me throughout this difficult semester
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