Are airline flight arrivals ever on time? The general public thinks they are always latebut are they?

Question:

Are airline flight arrivals ever on time? The general public thinks they are always late€”but are they? The Bureau of Transportation keeps records and periodically reports the findings. Listed here are the percentages of on-time arrivals at the 31 major U.S. airports during the month of April 2009.

a. Draw a dotplot of on-time performance data.
b. Draw a stem-and-leaf display of these data.
c. Find the 5-number summary and draw a box-and whiskers display.
d. Find P10 and P20.
e. Describe the distribution of on-time percentage, being sure to include information you learned in parts a through d.
f. Why would you be more likely to talk about the top 80% or 90% of the performance percentages than the middle 80% or 90%?
g. Are there airports whose on-time percentages appear to be quite different from the rest? How many? Which ones? Explain.

Distribution
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