## PSY 2007 Week 4 Assignment 2 Z-Scores Calculation Recent

PSY 2007 Week 4 Assignment 2 Z-Scores Calculation Recent

**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.**

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**Selected two empirical articles on a research topic of interest. Provided a summary of both articles, including the following:**

**Explained whether the authors used a population or a sample. Explained how this could have affected the results. Analyzed and justified whether a sample was used and whether it was representative of the entire population.
Described the hypotheses of the studies. Stated the null and research hypotheses.
Described the major independent and dependent variables. Described one additional independent and one dependent variable to provide novel information.
Provided an example of a measure of central tendency and explained why the authors chose this measure as opposed to the other measures. Explained how the results might have differed if the authors had chosen another measure.
Provided an example of a measure of variability and explained why the authors chose this measure as opposed to the other measures. Explained how the results might have differed if the authors had chosen another measure.
Selected a result that includes the mean and the standard deviation, converted the values to a **

*z*-score, and interpreted how this score compares to the average. On the basis of the statistics used and the authors’ interpretation of the results, described which study did a better job and justified your stand with a specific example.