Exercises - Statistics - 5 - split

[zuzaa]

hello I really need help with these exercises . Thank you in advance!

5. The population mean waiting time to check out of a supermarket has been 10.73 minutes. Recently, in an effort to reduce the waiting time, the supermarket has experimented with a system in which there is a single waiting line with multiple checkout servers. A sample of 100 customers was selected, and their mean waiting time to check out was 9.66 minutes, with a sample standard deviation of 5.9 minutes. At the 0.05 and 0.1 level of significance, test whether is evidence that the population mean waiting time to check out is different than 10.73 minutes?


this is just something i need to pass , and english is not even my first language ( and I do not live in english-speaking country) so even if i had thoughts about it I would not be able to share them with you so please helpp

 

[Deleted member 4993]

hello I really need help with these exercises . Thank you in advance!

5. The population mean waiting time to check out of a supermarket has been 10.73 minutes. Recently, in an effort to reduce the waiting time, the supermarket has experimented with a system in which there is a single waiting line with multiple checkout servers. A sample of 100 customers was selected, and their mean waiting time to check out was 9.66 minutes, with a sample standard deviation of 5.9 minutes. At the 0.05 and 0.1 level of significance, test whether is evidence that the population mean waiting time to check out is different than 10.73 minutes?

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