Question

The table below gives percent of flights that were delayed and on time during good and bad weather.

Good weather Bad Weather

Delayed 7.5% 17.5%
On Time 42.5% 32.5%

Given these percentages, during bad weather, is it more likely that your flight will be delayed or on time? How much more likely?

Answer 1

More likely: on time

By 0.3 or 30%

Explanation:

Bad weather is column 2

P(delayed) = 17.5/(17.5+32.5)

= 17.5/50 = 0.35

P(on time) = 32.5/(17.5+32.5)

= 32.5/50 = 0.65

0.65 - 0.35 = 0.3