Question

The accompanying data contain the rating of large and medium size airports in a particular​ country, based on a​ 1000-point maximum. Complete parts​ (a) through​ (d) below

. a. For large and medium airports​ separately, construct a 95% confidence interval estimate for the population mean rating

The 95​% confidence interval estimate for the population mean rating for large size airports is

nothing less than or equals≤muμless than or equals≤nothing.

​(Round to the nearest integer as​ needed.)

The 95​% confidence interval estimate for the population mean rating for medium size airports is nothing less than or equals≤muμless than or equals≤nothing.

​(Round to the nearest integer as​ needed.)

b. Interpret the intervals constructed in​ (a). Choose the correct answer below

A.The mean rating of 95​% of all samples of the same size for large size airports and medium size airports are contained in their respective intervals.

B.Conclude with 95​% confidence that the mean rating for each sample is contained in its interval.

C. 95​% of the sample data fall between the limits of their respective confidence intervals.

D.Conclude with 95​% confidence that the population mean ratings for large size airports and medium size airports are contained in their respective confidence intervals

c. What assumption must you make about the population distributions in order to construct the confidence interval estimates in​ (a)?

A.The population distributions are uniformly distributed.

B.The population distributions are unimodal and not extremely skewed.

C.The population distributions are skewed right.

D.The population distributions are skewed left.

d. Do you think that the assumption needed in order to construct the confidence interval estimates in​ (a) is​ valid? Explain.

Airport   Size   Rating   Airport   Size   Rating
Airport 1   Large   784   Airport 32   Medium   796
Airport 2   Large   775   Airport 33   Medium   792
Airport 3   Large   757   Airport 34   Medium   788
Airport 4   Large   752   Airport 35   Medium   787
Airport 5   Large   749   Airport 36   Medium   779
Airport 6   Large   749   Airport 37   Medium   783
Airport 7   Large   747   Airport 38   Medium   781
Airport 8   Large   744   Airport 39   Medium   778
Airport 9   Large   741   Airport 40   Medium   781
Airport 10   Large   740   Airport 41   Medium   778
Airport 11   Large   739   Airport 42   Medium   776
Airport 12   Large   737   Airport 43   Medium   775
Airport 13   Large   739   Airport 44   Medium   780
Airport 14   Large   736   Airport 45   Medium   774
Airport 15   Large   734   Airport 46   Medium   770
Airport 16   Large   733   Airport 47   Medium   770
Airport 17   Large   733   Airport 48   Medium   767
Airport 18   Large   734   Airport 49   Medium   765
Airport 19   Large   728   Airport 50   Medium   765
Airport 20   Large   726   Airport 51   Medium   762
Airport 21   Large   724   Airport 52   Medium   759
Airport 22   Large   720   Airport 53   Medium   759
Airport 23   Large   720   Airport 54   Medium   759
Airport 24   Large   714   Airport 55   Medium   757
Airport 25   Large   710   Airport 56   Medium   758
Airport 26   Large   703   Airport 57   Medium   744
Airport 27   Large   689   Airport 58   Medium   738
Airport 28   Large   688   Airport 59   Medium   729
Airport 29   Large   688   Airport 60   Medium   727
Airport 30   Large   670   Airport 61   Medium   725
Airport 31   Large   648   Airport 62   Medium   725
           Airport 63   Medium   723
           Airport 64   Medium   704

Answer 1