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Statistical Methods - Pediatric Residency Program

1 Statistical 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 2 Descriptive Statistics (contd) Two parameters used most frequently in clinical medicine Measures of Central Tendency Measures of Dispersion 5 Measures 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 valu

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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