Question 8- Subjects are randomly selected for a hearing test where th.pdf

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Question 2 (10 marks) The supply chain manager of a fresh food product company in Australian wants to determine whether the business plant location has any effect on operating cost. The manager has considered Melbourne, Sydney, Brisbane and Adelaide business plants and their operating costs over the past 5 months were recorded as below. Note: Assume the size of the business plants are similar across the locations At the 5% level of significance, is there evidence of a significant difference in mean operating cost across above locations? Use six steps process of hypothesis testing to answer the question. Note - You must show all the calculations. Excel output will not be graded. ANSWER:.

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Question 8: Subjects are randomly selected for a hearing test where the decibel Hearing Level
(db HL) will be measured in their right and left ears. A db HL measures the quietest sound a
subject can hear at a specific frequency (a smaller db HL means they can hear quieter sounds).
Data is summarized in the table below. Researchers want to test the theory that the right ear is
the dominant ear (can hear quieter sounds than the left ear). Conduct the appropriate hypothesis
test, showing all work.

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