chap 3-statistical treatment.pptx - Objectives 1 Know statistics and its branches 2 Identify the levels of measurement of variables 3 Determine the

chap 3-statistical treatment.pptx - Objectives 1 Know...

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Objectives: 1. Know statistics and its branches 2. Identify the levels of measurement of variables 3. Determine the common statistical tools
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Statistical Treatment of Data Statistics- body of knowledge and techniques used in collecting, organizing, presenting, analyzing and interpreting data Two branches of Statistics: 1. Descriptive - tabulating, depicting and describing the collected data 2. Inferential- involves making generalizations about the population
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Levels of Measurement of Variables Level of Measurement Nominal Data Name variables Ordinal Data Ranking (Very Good- Poor; Very Satisfied to Very unsatisfied) Interval Data Distance has meaning (ex: Scores Ratio Data Has natural zero (weight, height..)
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Descriptive Statistics Frequency Distribution Record of number Proportion Total frequency divided by the number of cases in each category Percentage Percentage x 100 Measure of Central Tendencies Mode: refers to the most frequently occuring score Median: Middle Most value Mean: Exact mathematical center of distribution Variability or Dispersion Range Average Deviation Variance Standard deviation
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