The duration (in minutes) for a sample of 20 flight-reservation telephone calls is shown in the followingtable:2.110.44.85.54.52.85.910.54.83.35.86.67.54.85.53.55.33.67.86.0NOTE: Ex=111 and x = 709.82Assuming the population has a normal distribution, find a 95% confidence interval for the populationmean time.

We assume the population has a normal distribution.

Answered: The duration (in minutes) for a sample…

MATLAB: An Introduction with Applications

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The duration (in minutes) for a sample of 20 flight-reservation telephone calls is shown in the following table: 2.1 10.4 4.8 5.5 5.9 10.5 4.5 4.8 3.3 5.8 2.8 6.6 7.5 4.8 5.5 3.5 5.3 3.6 7.8 6.0 NOTE: Ex=111 and x = 709.82