"Immediately after a ban on using hand-held cell phones while driving was implemented, compliance with the law was measured. A r

andom sample of 1,250 drivers found that 98.9% were in compliance. A year after the implementation, compliance was again measured to see if compliance was the same (or not) as previously measured. A different random sample of 1,100 drivers found 96.9% compliance."
a. State an appropriate null and alternative hypothesis for testing whether or not there is any statistical difference in these two proportions measured initially and then one year later.
b. Conduct the test of hypothesis you stated in part a). Be sure to check the conditions for your test. State the P-value of your test and your conclusion.