Mathematics, 27.06.2020 03:01 jackfrost5
The Port Authority sells a wide variety of cables and adapters for electronic equipment online. Last year the mean value of orders placed with the Port Authority was $47.28, and management wants to assess whether the mean value of orders placed to date this year is the same as last year. The values of a sample of 49,896 orders placed this year are collected and recorded in the file PortAuthority.
A) At the 5% level of significance, test whether the mean value of this year’s orders differs from last year’s mean orders.
B) Port Authority also wants to determine if the gender profile of its customers has changed from last year when 65% of orders were placed by male customers. Test at 5% level.
C) At the 5% level of significance, can we conclude that the mean value of orders by male customers is higherthan the mean value of orders made by female customers?
Answers: 2
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