The mean number of flight hours for continental airline pilots is 49 hours per month. assume that this mean was based on a sample of 100 continental pilots and that the sample standard deviation was 11.5 hours. (a) calculate the margin of error for a 95% confidence interval. (b) calculate the upper bound for a 95% confidence interval.

Answer with explanation:

(a)

Mean number of flight hours for Continental Airline pilots = 49 hours per month

Total Sample Size =100

Standard Deviation =11.5 Hours

Margin of error for a 95% confidence interval

(b)

The Range of values for a 95% confidence interval

 ⇒     Mean number of flight  + Margin of Error  ≤  Confidence interval ≤    Mean number of flight  - Margin of Error      

⇒ 49+0.97  ≤  Confidence interval ≤ 49-0.97

⇒ 49.97  ≤  Confidence interval ≤48.03

Upper Bound = 49.97

∠cbe and ∠deb are same-side interior angles.

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