A car manufacturer claims that their new car batteries will…

A car manufacturer claims that their new car batteries will last 7 years. A group of concerned citizens argues that the batteries do not last as long as the manufacturer claims. To investigate the citizens’ claim, the car manufacturer surveys 20 random car owners and found the average battery lasted 6.89 years with a standard deviation of .25. Fill-in: If the car manufacturer wants to show the batteries do last 7 years they should run a [direction] one-sample [test] test.