Expedia would like to test the hypothesis that the proportion of Southwest Airline flights that arrive on- time is less than 0.90. A random sample of 140 United Airline flights found that 119 arrived on- time. Expedia would like to set α = 0.05. The critical value for this hypothesis test would be
-------.
A)2.33
B)1.645
C)2.05
D)1.28

Question

Expedia would like to test the hypothesis that the proportion of Southwest Airline flights that arrive on- time is less than 0.90. A random sample of 140 United Airline flights found that 119 arrived on- time. Expedia would like to set α = 0.05. The critical value for this hypothesis test would be 
-------.
A)2.33
B)1.645
C)2.05
D)1.28

Quizplus · Accepted Answer

The critical value for a one-tailed hypothesis test at α = 0.05 is 1.645. This is because the test is checking if the proportion is less than a specific value (0.90), making it a one-tailed test, and the standard critical value for a one-tailed test at the 0.05 significance level is 1.645.

Expedia Would Like to Test the Hypothesis That the Proportion