Answer:
The correct statement is
The null hypothesis is 
The alternative hypothesis is 
Step-by-step explanation:
From the question we are told that
The population proportion is p = 0.18
The sample size is n = 1240 airplane
The number of airplane is k = 310
Generally the sample proportion is

=> 
=> 
The null hypothesis is 
The alternative hypothesis is 
y=(c+b)/ab. Hope this helped, could I possibly get brainliest?
Answer:
1 hour and 53 minutes
Step-by-step explanation:
Your welcome
Answer:
Sydney is 42 years old
Step-by-step explanation:
57 - 15 = 42