Lab8_Sp08_Answers_prtIIonly

Lab8_Sp08_Answers_prtIIonly - Name: _ Lab #8 PSY031: SP08...

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Name: _____________________________ Lab #8 PSY031: SP08 Lab Partner(s): _________________________________________ Lab #8 Part II. Do not use SPSS to answer these questions. Please show all work and make sure to answer the entire question. Round all final answers to the 3 rd decimal place. All tests are 2-tailed with alpha set to 0.05. to the 3 rd decimal place. Please remember to report specific p-values where possible. QUESTION ONE. The family is thought to play a pivotal role in the lives of adolescent females suffering from anorexia nervosa. Everitt and colleagues (1994) investigated the impact of family therapy as a means of treatment for anorexia. The participants were weighed before and after therapy. Subject # Before Therapy After Therapy Difference Score 1 83.80 95.20 11.40 2 83.30 94.30 11.00 3 86.00 91.50 5.00 4 82.50 91.90 9.40 5 86.70 100.3 13.60 6 79.60 76.70 -2.90 7 76.90 76.70 -0.20 8 94.20 101.6 7.40 9 73.40 94.90 21.50 10 80.50 75.20 -5.30 11 81.60 77.80 -3.80 12 82.10 95.50 13.40 13 77.60 90.70 13.10 14 83.50 92.60 9.10 15 89.90 93.80 3.90 16 86.00 91.70 5.70 17 87.30 98.00 10.70 18 83.80 95.20 11.40 19 83.30 94.30 11.00 Complete all steps of hypothesis testing. Was family therapy beneficial? Label each step and make sure your answer is clearly marked. Make sure your decision includes information about 1) significance 2) reject the null, retain the null, or other 3) the interpretation of your results in the context of the study and 4) APA format.
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Name: _____________________________ Lab #8 PSY031: SP08 Step One: 0 1 :0 D D HM = Step Two: ratio (weight) Step Three: Dependent t-Test (no population parameters; interval ratio data; one IV (i.e., time) with two levels; dependent scores – paired on subject) Step Four: 0.05 ?0 . 4 4 α β = == Step Five: 0.50 19 2.1794 0.56 mei dn power δ = = = = Step Six: Data = done Step Seven: Statistical Significance (1 ) / 7.652632/(6.878741/ 19) 4.84929 (18) 4.849, 0.05 / 2.101 DD CRIT tn M SE tp t −= = = =< =+ −
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This note was uploaded on 04/07/2008 for the course PSY 031 taught by Professor Dicorcia during the Spring '08 term at Tufts.

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Lab8_Sp08_Answers_prtIIonly - Name: _ Lab #8 PSY031: SP08...

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