A certain brand of cereal is packaged to contain 16 ounces on the average. A consumer agency has received many complaints claiming that packages of the cereal contain less than 16 ounces. To test this claim the agency randomly sampled 100 packages and found a mean of 15.1 ounces with a standard deviation of 3 ounces

What is the value of the test statistic used to test the claim ? ( No need to round)