Ecercise 08.17 algorithmic The international air transport association surveys business travelors to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each travler is asked to provide a rating for the main international airport. The eatinga obtained from the sample of 50 business travelers follow. 5 9 10 2 2 2 2 7 7 7 7 6 7 8 9 9 2 10 2 7 6 9 8 10 9 2 7 5 7 2 2. 7 7 6 2 10 8 2 6 6 9 5 2 10 7 10 2 2 6. 6 Develop a 95% confidence interval estimate of the pooulation mean rating for miami. Round your answers to 2 decimal places ( , )
Ecercise 08.17 algorithmic
The international air transport association surveys business travelors to develop quality ratings for transatlantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each travler is asked to provide a rating for the main international airport. The eatinga obtained from the sample of 50 business travelers follow.
5 9 10 2 2 2 2 7 7 7 7 6 7
8 9 9 2 10 2 7 6 9 8 10 9 2
7 5 7 2 2. 7 7 6 2 10 8 2 6
6 9 5 2 10 7 10 2 2 6. 6
Develop a 95% confidence
( , )
From the given information, there are 50 data values.
The mean of the data set is 6 and it is obtained by the Excel function, “=AVERAGE(D2:D51)”. Here, the column represents the data values.
The standard deviation of the data set is 2.857 and it is obtained by the Excel function, “=AVERAGE(D2:D51)”.
The confidence level is 95%.
From the standard normal table, the critical value for 0.05(1-0.95) level of significance is 1.96.
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