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StatisticsQ&A LibraryThe telecommunications manager at Lowell Call Center is concerned about the average difference in the downtime between day and night operations at the center. A random sample of 45 day shifts and 45 night shifts shows that average downtime for the day shift sample is 53 minutes with a standard deviation of 18 minutes. Average downtime for the night shift sample is 48 minutes with a standard deviation of 14 minutes. Is the difference in sample average downtimes statistically significant at the 5% significance level?Start your trial now! First week only $4.99!*arrow_forward*

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The telecommunications manager at Lowell Call Center is concerned about the average difference in the downtime between day and night operations at the center. A random sample of 45 day shifts and 45 night shifts shows that average downtime for the day shift sample is 53 minutes with a standard deviation of 18 minutes. Average downtime for the night shift sample is 48 minutes with a standard deviation of 14 minutes. Is the difference in sample average downtimes statistically significant at the 5% significance level?

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