According to a study the average waiting time at the drive thru window at Mc Donald as measured from the time a customer places an order until the time a customer receives his order was 3.7 minutes. The franchise personnel believes that the  average waiting time is not  equal to 3.7 minutes. He wanted to institute a new process intended to reduce waiting time. A random sample of 25 orders were collected, and yields a mean waiting time of 3.84 minutes with a sample standard deviation of 0.4 minute. Test this claim at α = 0.05 level of significance. Null hypothesis can be formulated as; Ho: μ = 3.7 minutes Ho: μ < 3.7 minutes Ho: μ > 3.7 minutes   Alternative hypothesis can be formulated as; Ha: μ ≠ 3.7 minutes Ha: μ < 3.7 minutes Ha: μ > 3.7 minutes   The confidence level that accepting the null hypothesis is the right thing to do is; 91% 95% 99%   The appropriate test statistic to be used is; F-test Z-test T-test

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