A major airline company is concerned that its proportion of late arrivals has substantially increased in the past month. Historical data shows that on the average 18% of the company airplanes have arrived late. In a random sample of 1,240 airplanes, 310 airplanes have arrived late. If we are conducting a hypothesis test of a single proportion to determine if the proportion of late arrivals has increased, what is the correct statement of null and alternative hypotheses

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  

the answer is d. (1.2, -4.7) on edgn

hope this !

28

step-by-step explanation:

because that's the answer