Mathematics, 11.03.2020 23:21, Rocko420

Suppose the weights of seventh‑graders at a certain school vary according to a Normal distribution, with a mean of 100 pounds and a standard deviation of 7.5 pounds. A researcher believes the average weight has decreased since the implementation of a new breakfast and lunch program at the school. For a test of significance, what is the null hypothesis?

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Suppose the weights of seventh‑graders at a certain school vary according to a Normal distribution,...