A? government's department of transportation reported that in? 2009, airline A led all domestic airlines in? on-time arrivals for domestic? flights, with a rate of 83?%.
Complete parts a through e below.
a. What is the probability that in the next six? flights, exactly four flights will be on? time?
The probability is _____________
?(Round to four decimal places as? needed.)
b. What is the probability that in the next six? flights, two or fewer will be on? time?
The probability is _________
?(Round to four decimal places as? needed.)
c. What is the probability that in the next six? flights, at least four flights will be on? time?
The probability is _____
?(Round to four decimal places as? needed.)
d. What are the mean and standard deviation for this? distribution?
The mean of the number of? on-time arrivals is _______
?( Type an integer or a decimal. Do not? round.)
The standard deviation of the number of? on-time arrivals is_________
?(Round to four decimal places as? needed.)