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

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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 that the amount of produce in each container follows a normal distribution with a mean of 16 ounces and a standard deviation of 0.15 ounce. A sample of 50 containers filled last hour revealed that the mean amount per container was 16.017 ounces. Does the evidence suggest that the mean amount dispense is different from 16 ounces? Use the .05 significance level.