Alliance Airlines has current feet of 200 aircraft. The table below shows the number of aircraft of various types along with the age of each aircraft.

a. Show the age data in a frequency table and construct the corresponding bar chart. Use x to represent aircraft age and f(x) to count the number of aircraft at each age.

b. Compute the mean age of Alliance’s feet.

c. What is the median age of the feet?

d. Compute the variance and the standard deviation for the feet age data.

Transcribed Image Text:

Type B737-800 B747-400 B757-200 B757-30O B767-300ER B767-40OER B777-200ER Number 2 15 16 58 21 : A319-100 10 A330-200 MD-88 CRJ-700 8