Chicken Delight claims that 92% of its orders are delivered within 10 minutes of the time the order is placed. A sample of 90 orders revealed that 72 were delivered within the promised time. At the 0.05 significance level, can we conclude that less than 92% of the orders are delivered in less than 10 minutes?

a) What is the decision rule?(Negative value should be indicated by a minus sign. Round your answer to 2 decimal places.)

b) Compute the value of the test statistic.(Negative value should be indicated by a minus sign. Round the intermediate values and final answer to 2 decimal places.)

c) What is your decision regarding the null hypothesis?