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.
-What is the p-value? (computer or calculator for normal distribution required)
A) p-value = 0.0062
B) p-value = 0.0124
C) p-value = 0.0456
D) p-value = 0.2148

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.
-What is the p-value? (computer or calculator for normal distribution required)
A) p-value = 0.0062
B) p-value = 0.0124
C) p-value = 0.0456
D) p-value = 0.2148

Quizplus · Accepted Answer

The p-value is calculated using a two-proportion z-test. The test statistic is approximately 2.50, and the corresponding p-value is approximately 0.0124.

Use the Following Information for Questions