Statistical Distribution

Introduction to Statistical Distribution

  • Grasp the concept of a statistical distribution, a function that describes the probability of a random variable.
  • Understand the difference between discrete and continuous distributions. Discrete distributions have distinct values whereas continuous distributions have an infinite number of possible values.

Discrete Distributions

  • Familiarise with the Binomial distribution, used when there are exactly two mutually exclusive outcomes of a trial.
  • Recognise Poisson distribution which represents the number of events in a fixed interval of time or space.
  • Get grip on the aspects of the Geometric distribution, used to represent the number of trials required for the first success.

Continuous Distributions

  • Comprehend the Uniform distribution model where all outcomes are equally likely.
  • Delve into the Normal distribution, also known as Gaussian distribution. It’s used in statistics for a complex random variable whose distribution is not known.
  • Build understanding around the Exponential distribution, used to model the time between the occurrence of events.

Probability Distribution Functions

  • Understand the difference between probability density function (pdf) and cumulative distribution function (cdf). Pdf gives the probability of a range of outcomes, while the cdf gives the cumulative probability.
  • Be comfortable working with and interpreting histograms, frequency polygons, or cumulative frequency graphs generated from pdfs and cdfs.

Central Tendency and Dispersion

  • Grasp the concepts of mean, median, and mode as measures of central tendency in statistical distributions.
  • Recognise the range, variance, and standard deviation as measures of dispersion around the mean.
  • Appreciate the concept of skewness as a measure of the asymmetry of a distribution, and understand kurtosis as a measure of whether the data are heavy-tailed relative to the normal distribution.

Worked Examples and Problem-Solving

  • Frequent practice with calculations related to statistical distributions. This can range from simple calculations to more advanced problems.
  • Practise interpreting and analysing data represented by various distributions.
  • Keep learning to solve statistical distribution problems both algebraically and graphically.
  • Consolidate understanding through worked examples. Always look over completed problems again to ensure full comprehension and accuracy.
  • Stay persistent when working on statistical distributions. This consistent practice will sharpen problem-solving skills and foster a better understanding of the subject.