SPSS Analysis: Understanding Standard Deviation and SEM

QUESTION 9 8 points E Using the SPSS output from the previous question: 4b. What s the standard deviation (SDJ? (keep 2 decimal places) 738 QUESTION 10 8 points E Using the SPSS output from the previous question: 4c. What is the standard error of the mean? (keep 2 decimal places) 024 QUESTION 11 8points SaveAn: Refer to the SPSS output from the previous question. 4d. Using the SEM and values from the t distribution in Table A 2, compute the value of the 95% Cl around the mean (keep 2 decimal points) 28.75-29.69

QUESTION 6 Suppose we obtained data on vein size after application of a nitroglycerin ointmen Vein size is found to be 7.5 mm with an D of 2.5. 3b. From Table A2 (Page 412), the t value is 1.99. what are the confidence limits for mean? 078 7588 69 89 QUESTION 7 ‘Suppose we obtained data on vein size after appiication of a nitroglycerin ointment in size is found to be 7.5 mm with an SD of 2.5. 3c. what are the confidence limits for a 99% confidence interval around the mean? 7.0t08.0 60t09.0 ©68t082 55t09.5 QUESTION 8 Using SPSS Data Set “Statistics Polit Set8 data.sav", run a descriptive analysis for th study participants (Variable #18, bmi). Analyze > Descriptive Statistics -> Descriptives Move the variable bmi (variable #18) into the variable list Then click the pushdown for Options Select: mean, SD, minimum, maximum, and standard error (5.E. mean, or SEM) Click Continue and OK 4a. What is the mean BMI in this sample of low-income women? (keep 2 deci 2922

s s s, 1.4% QUESTION 2 Population A and Population B both have a mean height of 7¢ selected from Population A, and a random sample of 50 peof 2a: What is the SEM for Population A? (keep 3 decimal points) 1.095 QUESTION 3 Population A and Population B both have a mean height of 7( selected from Population A and a random sample of 50 peof 2b: What is the SEM for Population B7 (keep 2 decimal places) 085 QUESTION 4 Population A and Population B both have a mean height of 7( selected from Population A, and a random sample of 50 peof 2¢: Which sample mean will probably yield a more accurate es Population B QUESTION 5 Suppose we obtained data on vein size after application of a | vein size is found to be 7.5 mm with an SD of 2.5. 3a. Whatis the value of SEM? 025

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QUESTION 4 10 points m Based on the information provided and your answers to questions 1-4, which of the following statements is NOT correct. df (degrees of freedom) = 63. © We conclude that the average speed is probably/likely 55 mph. The actual tvalue is greater than the tabled t-value. The tabled t-value is 1.996 (or approximately 2.0). QUESTION 5 5 points m Based on the information provided and your answers to questions 1-4, you [A] reject or accept the null hypothesis? reject QUESTION 8 10 points Using the information provided in question 6 and the SPSS output, match each statement with s correct response. A % The physical health status of women in this A alternative hypothesis sample s not comparable to that of people 8 null hypothesis nationally 3 B. 4 The physical health status of women in this sample is comparable to that of people nationally QUESTION 9 15 poines [ Using the information provided in question 6 and the SPSS output, answer the following questions. The value of t for the physical health component score is -13.469 ‘The value of t for the mental health component score is -8.770 QUESTION 10 5 points m Based on the information provided in question 6 and the SPSS output, which of the following statements is true? The value for SF12phys is statistically significant; the value for SF12mentis not statistically significant. Neither of the t values are statistically significant. The value for SF12phys is not statistically significant; the value for SF12ment is statistically significant. © Both of the t values are statistically

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