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1 A Market researcher is interested in determining the age range of their customer base. The researcher takes a sample of 42 customers and finds

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1 A Market researcher is interested in determining the age range of their customer base. The researcher takes a sample of 42 customers and finds 2 the mean age to be 50.579. Assume that o equals 1.60 3 4 Determine a 95% confidence interval 5 6 Mean 50.579 7 Standard Deviation 1.6 8 Sample Size 42 9 10 Required: 11 Margin of Error 0.483895305 12 13 Upper Bound Confidence interval 51.06289531 14 Lower Bound Confidence interval 50.09510469 15 16 17

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