Suppose in your sample of 25 trucks, you found a sample mean of 19.58 cubic feet, and a standard deviation of 2.3 cubic feet. What test statistic and P-value result from this sample mean?

Atourist boat is used for sightseeing in a nearby river. the boat travels 2.4 miles downstream and in the same amount of time, it travels 1.8 miles upstream. if the boat travels at an average speed of 21 miles per hour in the still water, find the current of the river.