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The Number of Television Sets Produced from an Assembly Line

Question 29

Multiple Choice

The number of television sets produced from an assembly line each day is known to have a standard deviation of 17.4 sets per day.The production line averaged 452.3 sets per day for 20 randomly selected days.Which of the following represents a 95% confidence interval for the population mean number of sets per hour?


A) 452.3 ± 9.4
B) 452.3 + 11.3
C) 452.3 ± 13.8
D) 452.3 ± 7.63

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