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STATISTICAL EVALUATION

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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  1. STATISTICAL EVALUATION

  2. STATISTICS Branch of mathematics concerned with summarizing and making meaningful inferences from collections of data

  3. Descriptive statistics The listing and summarizing of data in a practical, efficient method

  4. Histogram - show frequency distribution by means of rectangles

  5. Central Tendency A number that describes something about the “average” score of adistribution mode, median, mean

  6. MODE • Most frequent score • 63, 75, 75, 79, 82, 82, 84, 84, 84, 84, 91 ,99 • what is the mode?

  7. 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?

  8. MODE • 63, 75, 75, 79, 82, 82 ,91, 99 • 75 and 82 • bimodal • distributions with 2 modes

  9. MEDIAN • The middle score after the scores are ranked from highest to lowest • 65, 78, 78, 81, 84, 92, 96 • what is the median?

  10. MEDIAN • 65, 78, 78, 81, 84, 92, 96 • 81

  11. MEAN • The average • 65, 78, 78, 81, 84, 92, 96 • what is the mean?

  12. MEAN • 65+78+78+81+84+92+96=574 • 574/7= • 82

  13. 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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