October 2021

Normal distribution or Gaussian distribution or Gauss distribution or Laplace–Gauss distribution, in probability theory, is a type of continuous probability distribution for a real-valued random variable. This post constitutes Lesson 5 of the Basic Statistics Mini-Course. You may be also interested in Normal approximation to the binomial distribution. Key concepts covered in this post: the normal […]

Data spread or data variability of a distribution is the extent to which the scores vary around their central tendency. Data spread is a measure of how far the numbers in a data set are away from the mean or median. Common methods to investigate the variability in data sets are the range, the interquartile range,

Measures of central tendency help us locate the centre of the data, which allows us to make predictions about what is likely to happen. The most common measures of central tendency are the mean, the median, and the mode. This post constitutes Lesson 3 of the Basic Statistics Mini-Course. You may be also interested in Analyzing

Data presentation in statistics is done using tables, charts, diagrams, or graphs and is part of the data analysis and reporting phase of the data analysis life cycle. Visual data presentation helps data analysists identify and understand relationships between and within data sets to inform science-based decision making. This post constitutes Lesson 2 of the Basic