Question
44. Below is the table from Exercise 2 showing the number of flights at US airports that were delayed on the tarmac formore than threehours
44. Below is the table from Exercise 2 showing the number of flights at US airports that were delayed on the tarmac formore than threehours before departureduring a recent 12-month period (source:Department of Transportation Statistics ). "
"Month DelayedFlights
March 85
April 74
May 34
June 268
July 161
August 66
September 6
October 11
November 4
December 34
January 20
February 60
a. Show the box plot and use the "1.5 x interquartile range" approach to identify any outliers.
b. Use the "3-standard-deviation" approach to identify any outliers. (The standard deviation of the delay data is 73.5 flights.)
c. Calculate the z-score for the value 268."
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