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the population mean waiting time to check out of a...

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the population mean waiting time to check out of a supermarket has been 10.73 minutes. In an effort to reduce wait time, the supermarket has experimented with multiple checkout servers. A sample of 100 customers was selected and their mean time to check out was 9.52 minutes with a sample standard deviation of 5.8 minutes. a. At the 0.5 level of significance, using the critical value approach to hypothesis testing is there evidence the population mean waiting time is less than 10.73 minutes? b. At the 0.05 level of significance using the p-value approach to hypothesis testing is there evidence the population mean waiting time to check out is less than 10.73 minutes. c. Interpret the meaning of the p-value in this problem. d. Compare your conclusions in (a) and (b).

 

Paper#11702 | Written in 18-Jul-2015

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