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A researcher is examining depression questionnairescores for individuals who are taking a newdepression medication.She knows the population data on the questionnaire is = 58, =7.5.

A researcher is examining depression questionnairescores for individuals who are taking a newdepression medication.She knows the population data on the questionnaire is = 58, =7.5. She administers a new anti-depression medication to depressed patients and has them take the depression questionnaire.She wants to know if the depression medication decreases their depression scores.Test at= .01.

What is the critical value? (include the +/- symbol as necessary)?

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