Introduction to Statistics & Data Analysis in Public Health

Imperial College London via Coursera

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Overview

Welcome to Introduction to Statistics & Data Analysis in Public Health! This course will teach you the core building blocks of statistical analysis - types of variables, common distributions, hypothesis testing - but, more than that, it will enable you to take a data set you've never seen before, describe its keys features, get to know its strengths and quirks, run some vital basic analyses and then formulate and test hypotheses based on means and proportions. You'll then have a...

Syllabus

Introduction to Statistics in Public Health

Statistics has played a critical role of in public health research and practice, and youll start by looking at two examples: one from eighteenth century London and the other by the United Nations. The first task in carrying out a research study is to define the research question and express it as a testable hypothesis. With examples from the media, youll see what does and does not work in this regard, giving you a chance to define a research question from some real news stories.

Types of Variables, Common Distributions and Sampling

This module will introduce you to some of the key building blocks of knowledge in statistical analysis: types of variables, common distributions and sampling. Youll see the difference between well-behaved data distributions, such as the normal and the Poisson, and real-world ones that are common in public health data sets.

Introduction to R and RStudio

Now its time to get started with the powerful and completely free statistical software R and its popular interface RStudio. With the example of fruit and vegetable consumption, youll learn how to download R, import the data set and run essential descriptive analyses to get to know the variables.

Hypothesis Testing in R

Having learned how to define a research question and testable hypothesis earlier in the course, youll learn how to apply hypothesis testing in R and interpret the result. As all medical knowledge is derived from a sample of patients, random and other kinds of variation mean that what you measure on that sample, such as the average body mass index, is not necessarily the same as in the population as a whole. Its essential that you incorporate this uncertainty in your estimate of average BMI when presenting it. This involves the calculation of a p value and confidence interval, fundamental concepts in statistical analysis. Youll see how to do this for averages and proportions.