n 201 y 80.752 20 4.594 15 10 5 65 70 75 80 85 90 OT Departure (%) # of Months

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
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Departures 2011 What are the chances your flight
will leave on time? The U.S. Bureau of Transportation
Statistics of the Department of Transportation publishes
information about airline performance. Here are a histo-
gram and summary statistics for the percentage of flights
departing on time each month from 1995 thru September
2011. (www.transtats.bts.gov/HomeDrillChart.asp)There is no evidence of a trend over time.
a) Check the assumptions and conditions for inference.
b) Find a 90% confidence interval for the true percentage
of flights that depart on time.
c) Interpret this interval for a traveler planning to fly.
n 201
y 80.752
20
4.594
15
10
5
65
70
75
80
85
90
OT Departure (%)
# of Months
Transcribed Image Text:n 201 y 80.752 20 4.594 15 10 5 65 70 75 80 85 90 OT Departure (%) # of Months
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