Empirical Probability – Explained with Examples

Empirical Probability is defined as the probability of occurrence of an event calculated on the basis of past experience or experimental data. It is also known as experimental probability. Example 1: The most well known...

Frequency Polygon

A frequency polygon is a graphical way to visualize data given in the form of a frequency distribution table. It is similar to a histogram which is also used to visualize grouped data. We...

Cumulative Relative Frequency

Cumulative relative frequency refers to the proportion of data values that are less than or equal to a certain value. It is usually expressed in the form of a percentage. For example, suppose that in...

Left Skewed Histogram

A left skewed histogram is a histogram that attains a peak (which is the mode) towards the right side of the graph and has a "tail" towards the left side. This means that the...

Right Skewed Histogram

A right skewed histogram is a histogram that has a long tail towards the right end of the graph and has a peak towards the left. This means that the smaller values occur in...

Probability Mass Function

The probability mass function (p.m.f) for a discrete random variable is a function that allows us to calculate the probability that a random variable takes a particular value. What is a Probability Mass Function? Let ...

Pairwise Independent & Mutually Independent Events

Three or more events are said to be pairwise independent if they are independent when considered two at a time. Two events are independent if the probability of occurrence of one event does not...

n choose r(nCr) – Combination formula

The symbol nCr (pronounced n choose r) denotes the number of ways in which we can choose ‘r’ objects from a collection of ‘n’ number of objects. The combination formula is used in statistics...