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Statistical Methods - Pediatric Residency Program

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1Statistical Methods ITamekia L. Jones, Assistant ProfessorChildren s Oncology Group Statistics & Data Center Department of Biostatistics Colleges of Medicine and Public Health & Health ProfessionsOutline of TopicsI. Descriptive StatisticsII. Hypothesis Testing III. Parametric Statistical TestsIV Nonparametric Statistical Tests2IV. Nonparametric Statistical TestsV. Correlation and RegressionTypes of Data Nominal Data Gender: Male, Female Ordinal Data Strongly disagree, Disagree, Slightly disagree, Neutral, Slightly agree, Agree, Strongly agree3,gyg,g,gyg Interval Data Numeric data: Birth weight Descriptive Statistics Descriptive Statistical measurements are used Descriptive Statistical measurements are used in medical literature to summarize data or describe the attributes of a set of data Nominal data summarize using /i4rates/proportions. % males, % females on a clinical studyCan also be used for Ordinal data 2Descriptive Statistics (contd) Two parameters used most frequently in clinical medicine Measures of Central Tendency Measures of Dispersion 5Measures of Central Tendency Summary Statistics that describe the Summary Statistics that describe the location of the center of a distribution of numerical or ordinal measurements where- A distribution consists of values o

Test Statistic • Statistics whose primary use is in testing hypotheses are called test statistics • Hypothesis testing, thus, involves determining the value the test statistic must attain in order for the test to be declared significant. 27 • The test statistic is computed from the data of the sample. Hypothesis Testing (contd) Types of ...

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