a. Calculate the proportion of sampled airline flights that landed within 15 minutes of scheduled arrival.

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K
A large airport records the percentage of airline flights that land no later than 15 minutes after scheduled arrival. The average of
these percentages for 12 months last year was 71.3%. These data become available as soon as feasible. However, the airlines
can provide preliminary results by obtaining a sample. The accompanying data contains the sample data indicating the number of
minutes after scheduled arrival time that the aircraft arrived. Note that a negative entry indicates the minutes earlier than the
scheduled arrival time that the aircraft arrived. Complete parts a through c below.
Click the icon to view the table of arrivial times.
a. Calculate the proportion of sampled airline flights that landed within 15 minutes of scheduled arrival,
(Round to three decimal places as needed.)
h
Transcribed Image Text:K A large airport records the percentage of airline flights that land no later than 15 minutes after scheduled arrival. The average of these percentages for 12 months last year was 71.3%. These data become available as soon as feasible. However, the airlines can provide preliminary results by obtaining a sample. The accompanying data contains the sample data indicating the number of minutes after scheduled arrival time that the aircraft arrived. Note that a negative entry indicates the minutes earlier than the scheduled arrival time that the aircraft arrived. Complete parts a through c below. Click the icon to view the table of arrivial times. a. Calculate the proportion of sampled airline flights that landed within 15 minutes of scheduled arrival, (Round to three decimal places as needed.) h
ion
stion
estion 2
estion 3
estion 4
estion 5
Arrival Time
-4
- 20
-19
14
-17
5
11
-11
8
-8
-1
-7
15
9
17
-14
-10
-10
2
-11
7
4
17
4
17
Arrival Time
9
255
-5
-10
-21
10
-14
50
6
-9
37
40
47
49
-14
-19
-19
-1
-21
55
-23
7
-14
3
Arrival Time
28
-17
13
-1
4
52051553780156189 26 20
-5
-2
40
-8
40
5
7
15
Arrival Time
42
2204102
- 24
48
-14
-10
9
-5
-24
3
12
28
28
-14
9
11
-18
15
47
-18
-3
33
0
13
Arrival Time Full data table: D
-15
15
-17
3
-5
23
8
4
-25
14
26
12
19
2
36
-15
1
12
19
27
-1.
9
-7
23
-12
Transcribed Image Text:ion stion estion 2 estion 3 estion 4 estion 5 Arrival Time -4 - 20 -19 14 -17 5 11 -11 8 -8 -1 -7 15 9 17 -14 -10 -10 2 -11 7 4 17 4 17 Arrival Time 9 255 -5 -10 -21 10 -14 50 6 -9 37 40 47 49 -14 -19 -19 -1 -21 55 -23 7 -14 3 Arrival Time 28 -17 13 -1 4 52051553780156189 26 20 -5 -2 40 -8 40 5 7 15 Arrival Time 42 2204102 - 24 48 -14 -10 9 -5 -24 3 12 28 28 -14 9 11 -18 15 47 -18 -3 33 0 13 Arrival Time Full data table: D -15 15 -17 3 -5 23 8 4 -25 14 26 12 19 2 36 -15 1 12 19 27 -1. 9 -7 23 -12
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