Choco-Chippy Cookie Company has two different manufacturing plants. Company officials want to test whether each plant fills the bags with the same number of ounces. A random sample of cookie bags from plant A had a mean of 24.2 ounces in each bag. A random sample from plant B had a mean of 22.2 ounces. They randomized the data over 100 trials, and the difference of means for each trial is shown in the dot plot.

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