A survey of 77 commercial airline flights of under 2 hours resulted in a sample average late
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A survey of 77 commercial airline flights of under 2 hours resulted in a sample average late time for a flight of 2.48 minutes. The population standard deviation was 12 minutes. Construct a 95% confidence interval for the average time that a commercial flight of under 2 hours is late. What is the point estimate? What does the interval tell about whether the average flight is late?
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n 77 248 12 95 Confidence z 025 196 020 516 The point estimate is 248 Th...View the full answer
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Related Book For
Business Statistics For Contemporary Decision Making
ISBN: 978-1118749647
8th edition
Authors: Black Ken
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