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A researcher believes that high school students will have better academic performance with a later school day. The researcher studies students' grades before the experiment,

A researcher believes that high school students will have better academic performance with a later school day. The researcher studies students' grades before the experiment, then changes their school start time and analyzes their grades afterward.

A. the Type I and Type II error for that scenario.

B. State whether their hypothesis is directional or non-directional.

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