Heinz, a manufacturer of ketchup, uses a particular machine to dispense 16 ounces

of its ketchup into containers. From many years of experience with the particular

dispensing machine, Heinz knows the amount of product in each container follows

a normal distribution with a mean of 16 ounces and a standard deviation of 0.13

ounce. A sample of 50 containers lled last hour revealed the mean amount per

container was 16.013 ounces. Does this evidence suggest that the mean amount

dispensed is di erent from 16 ounces? Use the .05 signicance level.