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Can you answer #2?

Can you answer #2?

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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Can you answer #2?

MNU © 2020 Page 2 of 3 TABLE VI I Quality of Life Experienced by Women and Men (N= 171) WOMEN (n = 74) MEAN (SD) MEN (n = 97) MEAN (SD) TVALUE (DF = 169) INSTRUMENTS AND COMPONENTS/SCALES P VALUE SF-36 (0 = low QoL, 100 = high QoL) -2.50 48.5 (5.7) 48.2 (7.6) 51.3 (23.7) 51.1 (7.4) 51.4 (7.5) 58.6 (24.1) 12.6 (23.7) 0.01 The Physical Component Score (PCS)* The Mental Component Score (MCS) -2.74 0.007 Physical Functioning (PF) -1.98 0.049 Role-Physical (RP) Bodily Pain (BP) General Health (GH) 4.7 (14.1) -2.54 0.007 57.6 (26.2) 62.5 (27.3) 0.24 51.1 (17.6) 54.2 (20.1) 0.30 39.8 (19.0) -2.31 Vitality (VT) Social Functioning (SF) 47.5 (23.2) 0.02 61.0 (27.4) 66.1 (23.2) 0.19 Role-Emotional (RE) 27.5 (39.5) 37.8 (42.7) 0.11 Mental Health (MH) 62.3 (22.9) 72.7 (20.1) -3.15 0.002 QLI (0 = low QoL, 30 = high QoL) Total Scale 20.1 (3.5) 21.2 (3.6) -2.06 0.04 Health Functioning 17.9 (4.1) 19.3 (4.6) -1.99 0.049 Socioeconomic 22.6 (3.6) 22.9 (3.7) 0.58 19.6 (4.6) 21.1 (4.3) 26.0 (3.9) Psychologic/spiritual -2.10 0.04 Family (N= 69 women and 94 men) 25.6 (4.7) 0.51 *PCS = PF, RP, BP, GH. "MCS = VT, SF, RE, MH. "df = 161. Sdf= 168. Qol = Quality of life; QLI, Quality-of-Life Index-Cardiac Version. Kristofferzon, M., Löfmark, R., & Carlsson, M. (2005). Perceived coping, social support, and quality of life 1 month after myocardial infarction: A comparison between Swedish women and men. Heart & Lung, 341). p. 47. Study Questions 1. t= -1.99 describes the difference between women and men post myocardial infarction (MI) for what variable? 2. Consider t= -2.74 and t= -2.31. Which calculated t ratio has the smaller p value? Provide a rationale for your answer. 3. Examine the results in Table VI. Which t ratio listed in the table had the largest p value? What was the focus of this t-test, and were the results significant? Provide a rationale for your answer. 4. What is df? Why is it important to know the df for a t ratio? How would you calculate the df for a t-test, and what is the df for this study? 5. What is the cause of an increased risk for Type I errors when t-tests are conducted? How might researchers eliminate the increased risk for a Type I error in a study? 6. Given the information presented in Table VI, calculate a Bonferroni procedure for this study. 7. Does this study meet the assumptions for the t-test? Provide a rationale for your answer. 8. What sampling method did the researchers use in this study? Provide a rationale for your answer. 9. What level of data is analyzed by means and standard deviations? Is this level of data compatible with the assumptions for the 1-test? Provide a rationale for your answer. 10. Is the sample size adequate to detect significant differences between the two groups in this study? Source: Kristofferzon, M., Lofrnark, R., & Carlsson, M. (2005). Perceived coping, social support, and quality of life 1 month after myocardial infarction: A comparison between Swedish women and men. Heart & Lung. 34(1), 39-50. MNU © 2020 Page 3 of 3
Transcribed Image Text:MNU © 2020 Page 2 of 3 TABLE VI I Quality of Life Experienced by Women and Men (N= 171) WOMEN (n = 74) MEAN (SD) MEN (n = 97) MEAN (SD) TVALUE (DF = 169) INSTRUMENTS AND COMPONENTS/SCALES P VALUE SF-36 (0 = low QoL, 100 = high QoL) -2.50 48.5 (5.7) 48.2 (7.6) 51.3 (23.7) 51.1 (7.4) 51.4 (7.5) 58.6 (24.1) 12.6 (23.7) 0.01 The Physical Component Score (PCS)* The Mental Component Score (MCS) -2.74 0.007 Physical Functioning (PF) -1.98 0.049 Role-Physical (RP) Bodily Pain (BP) General Health (GH) 4.7 (14.1) -2.54 0.007 57.6 (26.2) 62.5 (27.3) 0.24 51.1 (17.6) 54.2 (20.1) 0.30 39.8 (19.0) -2.31 Vitality (VT) Social Functioning (SF) 47.5 (23.2) 0.02 61.0 (27.4) 66.1 (23.2) 0.19 Role-Emotional (RE) 27.5 (39.5) 37.8 (42.7) 0.11 Mental Health (MH) 62.3 (22.9) 72.7 (20.1) -3.15 0.002 QLI (0 = low QoL, 30 = high QoL) Total Scale 20.1 (3.5) 21.2 (3.6) -2.06 0.04 Health Functioning 17.9 (4.1) 19.3 (4.6) -1.99 0.049 Socioeconomic 22.6 (3.6) 22.9 (3.7) 0.58 19.6 (4.6) 21.1 (4.3) 26.0 (3.9) Psychologic/spiritual -2.10 0.04 Family (N= 69 women and 94 men) 25.6 (4.7) 0.51 *PCS = PF, RP, BP, GH. "MCS = VT, SF, RE, MH. "df = 161. Sdf= 168. Qol = Quality of life; QLI, Quality-of-Life Index-Cardiac Version. Kristofferzon, M., Löfmark, R., & Carlsson, M. (2005). Perceived coping, social support, and quality of life 1 month after myocardial infarction: A comparison between Swedish women and men. Heart & Lung, 341). p. 47. Study Questions 1. t= -1.99 describes the difference between women and men post myocardial infarction (MI) for what variable? 2. Consider t= -2.74 and t= -2.31. Which calculated t ratio has the smaller p value? Provide a rationale for your answer. 3. Examine the results in Table VI. Which t ratio listed in the table had the largest p value? What was the focus of this t-test, and were the results significant? Provide a rationale for your answer. 4. What is df? Why is it important to know the df for a t ratio? How would you calculate the df for a t-test, and what is the df for this study? 5. What is the cause of an increased risk for Type I errors when t-tests are conducted? How might researchers eliminate the increased risk for a Type I error in a study? 6. Given the information presented in Table VI, calculate a Bonferroni procedure for this study. 7. Does this study meet the assumptions for the t-test? Provide a rationale for your answer. 8. What sampling method did the researchers use in this study? Provide a rationale for your answer. 9. What level of data is analyzed by means and standard deviations? Is this level of data compatible with the assumptions for the 1-test? Provide a rationale for your answer. 10. Is the sample size adequate to detect significant differences between the two groups in this study? Source: Kristofferzon, M., Lofrnark, R., & Carlsson, M. (2005). Perceived coping, social support, and quality of life 1 month after myocardial infarction: A comparison between Swedish women and men. Heart & Lung. 34(1), 39-50. MNU © 2020 Page 3 of 3
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