Summary

• Description:

  Statistics is the one subject that many clinical medicine students dread but absolutely need — and these notes make it genuinely accessible without watering anything down. Starting with a brief history of medical statistics (Nightingale, John Snow, Fisher) and the distinction between descriptive and inferential statistics, the notes move through the four scales of measurement (nominal, ordinal, interval, ratio) in a clear comparison table that explains which statistical methods apply to each. Measures of central tendency are covered with worked examples — mean (including from grouped data with a frequency table calculation), median (for odd and even datasets), and mode — with a guide on when to use each and why the mean fails with skewed data. The dispersion section covers range, interquartile range (with quartile calculation step by step), the semi-interquartile range, variance, and standard deviation with a full worked example, the 68-95-99.7 rule for normal distributions, percentiles (and their role in growth chart interpretation), and skewness with a clear three-curve diagram. Data types are classified by source (primary vs. secondary), by nature (numerical continuous/discrete vs. categorical nominal/ordinal), and by grouping. Vital statistics definitions and the full demographic rates section includes a nine-row table of Kenya-specific values for CBR, CDR, IMR, U5MR, maternal mortality ratio, NMR, TFR, and life expectancy — all with formulas and multipliers. Data analysis covers frequency distribution tables, and the final chapter explains when to use each graph type (bar chart, histogram, frequency polygon, pie chart, line graph, scatter plot, boxplot) with clear examples. Interpretation principles — statistical versus clinical significance, confidence intervals, and bias — close the document. An honest, example-rich, and exam-ready guide to a subject that rewards the students who take the time to understand it.

• File Size:

  943.61 KB
• Length:

  17 pages
• Category:

  KMTC Notes
• Posted By:

  Caleb_Peter

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