uestion Completion Status: QUESTION 34 A researcher wants to test the effectiven

Question

uestion Completion Status: QUESTION 34 A researcher wants to test the effectiveness of a new therapy for depression. She gives 30 randomly selected patients a standard questionnaire that measures depressive symptoms. She then gives them a new therapy for six weeks. At the end of the six weeks she gives them the same depression questionnaire again. Which statistical test will tell her if there has been a change in the depression scores? z-score for sample means (single-samplesztest) single-sample t test independent-measures t test related-samples t test O lick Sove and Submit to save and submit, Click Sove All Answers to sove all answers Save

Explanation / Answer

related sampes/dependent t test.

both are contonuous variables and same samples are used.

tests the differences for one group between matched pairs.

How to intrepret

if p<0.05,

mean change between measurements.

That is there is significant difference between pretest and posttest where the score was significnatly higher /lower.

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RELATED SAMPLES T TEST

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