Identify the Null and Alternative Hypotheses for the Following Problems

Essay

Identify the null and alternative hypotheses for the following problems.
a.The manager of a restaurant believes that it takes a customer no more than 25 minutes to eat lunch.
b.Economists have stated that the marginal propensity to consume is at least 90¢ out of every dollar.
c.It has been stated that 75 out of every 100 people who go to the movies on Saturday night buy popcorn.