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(Solved): following. =45M=45M=45=45 ...

$following. \[ \begin{array}{l} \mu=45 \\ M=-45 \\ M=45 \\ \mu=-45 \end{array} \]$

following.

μ = 45 M = - 45 M = 45 μ = - 45

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The correct null hypothesis for a one-tailed test, assuming the researcher predicts a decrease in scores due to the experimental treatment, would be:

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