HDFS 350 Lecture 3: 3. Results
28 May 2019
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Preliminary analyses : initial group differences before. Ses correlations ete hypotheses restated with results of each tables or figures central tendency. Mode : most common response useful for categorical 4 discrete ordinal data caution can be bi or multimodal. / 2 use with ordinal raw data good when outliers caution must stats use mean. Scores can"t correlate it too little variability range. Standard not skewed by deviation extreme scores about. I sd offmean is affected by extreme but includes all data. Shapes of distributions symmetry : balanced tails of distribution positive skew : tail points right negative skew : tail points left types of figures: bar graph : for categorical data. , separate bars histogram : similar to bar graph , but for continuous data being grouped into intervals. Boxplot : pie charts : inter quartile range data categorical defines box. Shows skewness through whiskers and separates outliers e scatter plots : regression line for correlation between points.
