Use the following information for questions:
An airport official wants to prove that the p 1 = proportion of delayed flights after a storm for Airline 1 was different from p 2 = the proportion of delayed flights for Airline 2. Random samples from the two airlines after a storm showed that 50 out of 100 of Airline 1's flights were delayed, and 70 out of 200 of Airline 2's flights were delayed.
-Report your conclusion in terms of the two airlines.
A) The proportion of delayed flights after a storm for Airline 1 seems to be different than the proportion of delayed flights after a storm for Airline 2.
B) The results are not statistically significant: there is not enough evidence to conclude there is a difference between the two proportions.
C) The difference in proportions of delayed flights is at least 15%.
D) The proportion of delayed flights after a storm for Airline 1 seems to be the same as the proportion of delayed flights after a storm for Airline 2.

Question

Use the following information for questions:
 An airport official wants to prove that the p 1 = proportion of delayed flights after a storm for Airline 1 was different from p 2 = the proportion of delayed flights for Airline 2. Random samples from the two airlines after a storm showed that 50 out of 100 of Airline 1's flights were delayed, and 70 out of 200 of Airline 2's flights were delayed.
-Report your conclusion in terms of the two airlines.
A) The proportion of delayed flights after a storm for Airline 1 seems to be different than the proportion of delayed flights after a storm for Airline 2.
B) The results are not statistically significant: there is not enough evidence to conclude there is a difference between the two proportions.
C) The difference in proportions of delayed flights is at least 15%.
D) The proportion of delayed flights after a storm for Airline 1 seems to be the same as the proportion of delayed flights after a storm for Airline 2.

Quizplus · Accepted Answer

The proportion of delayed flights for Airline 1 is 50/100 = 0.5 (50%), and for Airline 2 it is 70/200 = 0.35 (35%). Since these proportions are different, it suggests that the proportion of delayed flights after a storm for Airline 1 seems to be different than the proportion for Airline 2.

Use the Following Information for Questions