Question

First Assignment (due Thursday January 17) 1. Evaluate the following expression: 9+4X2/ (Y+1)-3Z where X 3, Y-5, Z-2 2. Solve the following equation for X where s 3, X-8 and z1. Invent a study with a psychologically relevant variable, such as compliance, aggression cooperation, happiness, etc. as the dependent variable. (In other words your dependent variable should not being something like course grade of blood pressure level, even if you independent variable is psychologically relevant). For example, you may want to see whether doctors or nurses are more skilled at producing compliance with patients. Make sure that your dependent variable is at least at the ordinal scale of measurement. 3. a. Describe an independent variable/dependent variable study b. What is your independent variable? c. What are the levels (groups) of your independent variable?

Answer 1

1:

$9+4X^{2}/(Y+1)-3Z=9+4\cdot (3^{2})/(5+1)-3\cdot 2=9+4\cdot (9)/(5+1)-3\cdot 2$

$=9+4\cdot (9)/(6)-6=9+6-6=9$

Answer: 9

2:

$z=\frac{X-\bar{X}}{s}=\frac{X-8}{3}$

$-1=\frac{X-8}{3}$

$X=-3+8=5$

Answer: 5