# Understanding Data Representation and Plotting in Biostatistics

## Learn about the methods of presenting and plotting data with this free online course.

Publisher: NPTEL
Are you familiar with the process of obtaining an accurate picture from a large number of data points? This course demonstrates how to use statistical techniques to summarize the characteristics of a data set to draw meaningful conclusions. Study the various methods for presenting information in the form of charts and graphs. Discover how to use R programming for statistical analysis, graphical representation, and data reporting.

4-5 Hours

12

CPD

## Description

Biostatisticians play a unique role in protecting public health and improving people's lives. This course discusses the significance of plotting data to visualise variation or demonstrate relationships between variables. It begins by describing how statistics are used in data gathering, organisation, analysis, and interpretation. You will learn about various types of statistical studies as well as the process of selecting pre-arranged observations from a population in the form of a sample. In addition to this, you will also understand the importance of biostatistics in the development, implementation, and application of statistical methods in medical research. The concepts of descriptive and inferential statistics are then discussed. You will explore the process of describing and making predictions from data. Additionally, the methods for summarising the characteristics of a data set in order to draw meaningful conclusions using statistical techniques are explained. Following that, you will explore the methods for calculating the values of the same and different units.

The following section deals with the main differences and the process of arithmetic and geometric calculation. Next, you will learn how to calculate the range, absolute mean, and standard deviation. In addition, you will study the process of determining the spread of data points from the centre using measures of variability. Following that, the procedure for calculating the standard error of the mean (SEM) is described. You will discover the method of determining the deviations from the mean. In addition, you will also learn how to use the Z-score to calculate the chance of a score falling into a normal distribution and how to compare two scores from different normal distributions. Following that, you will learn how to graphically display numerical group data based on quartiles using box plots. You will also discover how to use a box plot to show the form of distribution, as well as its central value and variability.

Finally, the concepts of moments, as well as the skewness of statistical distribution, are described. You will comprehend the significance of moments in studying a distribution's central tendency, dispersion, skewness, and kurtosis. Next, the process of utilising skewness to measure the symmetry of distribution is explained. You will discover how the variation of the distribution from the normal distribution can be measured by the skewness. Following that, you will discover how to use Kurtosis to determine whether data is heavy-tailed or light-tailed in comparison to a normal distribution. In addition, you will learn how kurtosis helps in comprehending where the most information is hiding and how to analyse outliers in a given dataset. Lastly, the course shows how to use the R programming language to perform a variety of statistical tasks such as data cleaning, analysis, and visualisation. This course helps you to understand how each form of data is processed, saved, and displayed within a device, as well as the implications for how it is used.

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