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(2) The removal of outliers is error prone because it involves multiple analyses, the results of which are easily confused in the process of analysis and reporting of results [14]. In total, we found the dfs of 35 of the 154 t tests (23%) to be inconsistent with the reported sample size (after checking for potential dropout or missingness). Thanks! Another explanation might be that articles in which nothing is reported about removing outliers, actually did involve the removal of outliers (or other data points). The bootstrap procedure gave comparable results (p=.311). Results of the negative binomial regressions for all errors, large reporting errors, and gross errors. Figure 12.12 Sample APA-Style Bar Graph, With Error Bars Representing the Standard Errors, Based on Research by Ollendick and Colleagues, Figure 12.5 Bar Graph Showing Mean Clinician Phobia Ratings for Children in Two Treatment Conditions, Figure 12.13 Sample APA-Style Line Graph Based on Research by Carlson and Conard, Figure 12.14 Sample APA-Style Scatterplot, Figure 12.8 Statistical Relationship Between Several College Students Scores on the Rosenberg Self-Esteem Scale Given on Two Occasions a Week Apart, Figure 12.15 Sample APA-Style Table Presenting Means and Standard Deviations, Figure 12.16 Sample APA-Style Table (Correlation Matrix) Based on Research by McCabe and Colleagues, http://open.lib.umn.edu/psychologyresearchmethods/, CC BY-NC-SA: Attribution-NonCommercial-ShareAlike. HUMo0W(*]E (vpkH Km~?$]lY"GZM,jWjVb'QYeRd=e+4EgF|&Cf&!(vjyV1K5sG>{dD.$I|^8F>]&.U%Hx&&1t|v3jX&&glyBmGk$yUj!7# The first thing to do is move your Dependent Variable, in this case Sales Per Week, into the Dependent box. First, the effect could be smaller than expected, which might have resulted in a power that was too low to detect an effect in the current sample. Psychological Review, 100, 204232. Finally, the straight line that best fits the points in the scatterplot, which is called the regression line, can also be included. For reporting a Shapiro-Wilk test in APA style, we include 3 numbers: the test statistic W -mislabeled "Statistic" in SPSS; its associated df -short for degrees of freedom and. Outlier removal and the relation with reporting errors and quality of This article has really helped me and i have to say that you are a god send for creating this!