A police officer claims that the proportion of drivers wearing a seat belt in a certain area is less than 40% To test this claim, the officer collects a random sample of 80

drivers and monitors if the driver was wearing a seat belt. From this sample of 80 drivers, the police offers observes that 34 were wearing seat belts.

Assume the conditions needed to conduct a one sample proportion test are satisfied.

Thesetup for the null and alternative hypothesis is as follows:

H0 :p=0.40 ; Ha :p<0.40 , which is a left-tailed test.