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STATISTICAL EVALUATION. STATISTICS. Branch of mathematics concerned with summarizing and making meaningful inferences from collections of data. Descriptive statistics. The listing and summarizing of data in a practical, efficient method.

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## STATISTICAL EVALUATION

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**STATISTICS**Branch of mathematics concerned with summarizing and making meaningful inferences from collections of data**Descriptive statistics**The listing and summarizing of data in a practical, efficient method**Histogram - show frequency distribution by means of**rectangles**Central Tendency**A number that describes something about the “average” score of adistribution mode, median, mean**MODE**• Most frequent score • 63, 75, 75, 79, 82, 82, 84, 84, 84, 84, 91 ,99 • what is the mode?**MODE**• Most frequent score • 63, 75, 75, 79, 82, 82, 84, 84, 84, 84, 91 ,99 • 84 • 63, 75, 75, 79, 82, 82 ,91, 99 • what is the mode?**MODE**• 63, 75, 75, 79, 82, 82 ,91, 99 • 75 and 82 • bimodal • distributions with 2 modes**MEDIAN**• The middle score after the scores are ranked from highest to lowest • 65, 78, 78, 81, 84, 92, 96 • what is the median?**MEDIAN**• 65, 78, 78, 81, 84, 92, 96 • 81**MEAN**• The average • 65, 78, 78, 81, 84, 92, 96 • what is the mean?**MEAN**• 65+78+78+81+84+92+96=574 • 574/7= • 82**Inferential Statistics**Numerical methods used to determine whether research data support a hypothesis or whether results were due to chance used to make inference from our data to more general conditions

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