## PSY 2007 Assignment 3 Independent and Dependent Variables

PSY 2007 Assignment 3 Independent and Dependent Variables

**Addressed the following:**

**Identified the independent and dependent variables in this study. For the independent variables, explained the possible levels of the variables or the range of values.**

**Explained the relationship between the sample and the population in the study.**

**Identified the scales of measurement for each of the variables. Explained why the scale of measurement is appropriate for this study.**

**Provided the calculation for (ΣX)/n for the students’ evaluations (on a scale of 1 to 10).**

**Provided the calculation of (Σ(X + 5))/n for the students’ evaluations (on a scale of 5 to 15). (3 points)**

**Described the formula for the calculation if each student gives the professor one point higher.**

**Wrote in a clear, concise, and organized manner; demonstrated ethical scholarship in the accurate representation and attribution of sources (i.e., APA format); and displayed accurate spelling, grammar, and punctuation.**

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**Performed the following:**

**Collected the required data from a variety of individuals.**

**For each of the variables, manually calculated the mean, the median, the mode, the standard deviation, and the variance. **

**Interpreted the data for any interesting trends. Identified many trends and included your own novel interpretations of why they occurred.**

**Wrote in a clear, concise, and organized manner; demonstrated ethical scholarship in the accurate representation and attribution of sources (i.e., APA format); and displayed accurate spelling, grammar, and punctuation.**

**Performed the following calculations:**

**Determined what scores correspond to the top and bottom 10% and 25% of the data.
Transformed the z-score formula for solving for the individual score.
Determined the z-score that corresponds to the top 10% and substituted in your values for the mean and the standard deviation. Repeated the steps for the bottom 10% and the top and bottom 25%.
Determined what percentage will be between 3 and 7 for both variables.
Computed the z-score for each value. Explained the process for converting a z-score to a percentile.**