Sally has collected some data about the student’s attitude toward risk-taking. Three of the completed questionnaires can be found in the Appendix.
a. Create a new SPSS data file to store the data collected from the 3 completed questionnaires. In your data file, you have to define the variable name, variable label, variable value, value label, and measurement scale.
b. Compute a new variable "risk-taking" by summing up the scores from items 1 to 3 in Part I. Using SPSS and the data file you created, answer the following questions:
c. Find the (i) Mean, (ii) SD and (iii) Variance for age, items 1 to 3, and risk-taking. Copy and paste the relevant table(s) from the SPSS output on your answer sheet.
d. Transform the scores of items 1 to 3 so that the transformed scores will be ranged from -2 = strongly disagree to 2 = strongly agree. Find the (i) Mean (ii) SD and (iii) Variance of the transformed scores of items 1 to 3.
e. Compare the answers in (a) and (b), what conclusion can you draw about the change in mean and variance when a constant, b is added to every score of X (i.e. X + b)?
f. Transform the scores of items 1 to 3 so that the transformed scores will be equal to 2 times the original score. Find the (i) Mean (ii) SD and (iii) Variance of the transformed scores of items 1 to 3. Copy and paste the relevant table(s) from the SPSS output on your answer sheet.
g. Compare the answers in (a) and (d), what conclusion can you draw about the change in mean and variance when every score of X are k times larger than the original score (i.e. kX)?