For each of the following , state the null hypothesis and the alternative hypothesis : 

A new cash register has been installed at the Stop One Convenience Store . The manager wants to see if the new register has made a difference in the average amount of time a customer takes to be served . The previous mean time for a customer to be served was two minutes .

 b . The shipping dock receives 40 kilogram ( kg ) bags of flour to use in the production of the baked goods produced by Little Cakes Inc. A sample of 25 bags is taken from each shipment and weighed to ensure that the average weight is at least 40 kg . If not , the shipment is returned to the supplier .

 c . An insurance company states that its average claim is $ 1750 . However , the company auditor feels that the average amount is actually higher than $ 1750 and takes a sample of 60 recent claims to test his thcory 

d . The college cafeteria claims that the average amount spent by a student per visit is $ 3.25 . A random sample of 200 students is taken to see if this claim can be verified 2