Find the P-value for the indicated hypothesis test. An airline claims that the no-show rate for...
Find the P-value for the indicated hypothesis test. An airline claims that the no-show rate for passengers booked on its flights is less than 5%. Of 380 randomly selected reservations, 18 were no-shows. Find the P-value for a test of the airline's claim. Round to 2 decimals.
Homework Answers
H0: p = 0.05
Ha: p < 0.05
Sample proportion 
= 18 / 380
= 0.0474
Test statistics
z = - p / sqrt(
p ( 1 - p) / n)
= 0.0474 - 0.05 / sqrt( 0.05 * 0.95 / 380)
= -0.2326
p-value = P( Z < z)
= P( Z < -0.2326)
= 0.408
p-value = 0.41
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