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Blurb
An appliance factory in the United States would like to estimate how much its factory workers spend per week to purchase lunch meals. This is to help in determining whether it would be worthwhile to open and operate its own canteen facility. The Chief Operating Officer was advised by a senior data analyst that spending per week on lunch meals follows a normal distribution. A random sample of 36 workers who purchase lunch meals were surveyed. It revealed that on average they paid $95 per week in buying lunch meals with a standard deviation equal to $11.5. Estimate with 95% confidence the actual mean spending on lunch meals per week for all of the factory workers.
Question
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