8.a) Consider the data below for Alaska Airlines and for American West Airlines. Construct a bar graph which breaks down the data by airline and by city, and which shows, for each airline, the percentage of on-time flights at each city.

Question

b) Consider the data below for Alaska Airlines and for American West Airlines. Construct a bar graph which has only two bars. One bar should represent the percentage of on-time flights flown by Alaska Airlines (with all data from all cities used to calculate the percentage). The other bar should represent the percentage of on-time flights flown by American West (with all data from all cities used to calculate the percentage).

Data for Alaska Airlines:

On Time Delayed
Los Angeles 497 62
Phoenix 221 12
San Diego 212 20
San Francisco 503 102
Seattle 1841 305


Data for American West:

On Time Delayed
Los Angeles 694 117
Phoenix 4840 415
San Diego 383 65
San Francisco 320 129
Seattle 201 61

Answer 1

Cannot construct bar graph here.

For each airline, calculate total times, then total on time and total delayed. Divide latter two by total times to get %. Draw bars.