Question
According to a flight statisticswebsite, in2009, a certain airline had the highest percentage ofon-time flights in the airlinesindustry, which was 81.5%. Assume this percentage still
According to a flight statisticswebsite, in2009, a certain airline had the highest percentage ofon-time flights in the airlinesindustry, which was 81.5%. Assume this percentage still holds true for that airline. Use the normal approximation to the binomial distribution to complete parts a through c below.
a. Determine the probabilitythat, of the next 30 flights from thisairline, less than 23 flights will arrive on time.
P(x<23)=
(Round to four decimal places asneeded.)
b. Determine the probabilitythat, of the next 30 flights from thisairline, exactly 25 flights will arrive on time.
P(x=25)=
(Round to four decimal places asneeded.)
c. Determine the probabilitythat, of the next 30 flights from thisairline, 24, 25, 26, or 27 flights will arrive on time.
P(24x27)=
(Round to four decimal places asneeded.)
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