veral manufacturing facilities, Soppose employees have a suspicion that they are being over-exposed to high carbon monoxide. The company takes 30 readings to test the carbod monoxide level over several week span and find a sample mean of 55 ppm. For these manufacturing facilities is sigma = 12   A) Construct a 99% confidence interval for the population mean level of carbon monoxide at their facilities,   B) Suppose another sample

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A company owns several manufacturing facilities, Soppose employees have a suspicion that they are being over-exposed to high carbon monoxide. The company takes 30 readings to test the carbod monoxide level over several week span and find a sample mean of 55 ppm. For these manufacturing facilities is sigma = 12

 

A) Construct a 99% confidence interval for the population mean level of carbon monoxide at their facilities,

 

B) Suppose another sample of 30 readings are taken resulting in a sample mean level of CO of 60ppm. Create another interval for population mean, mew. Based on this sample, are workers being over exposed to carbon monoxide? Explain

 

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