Standard deviation is a measure of how spread out a dataset is. It is calculated by finding the difference between each data point in the dataset and the mean (average) of the dataset, squaring those differences, finding the average of the squared d...
The interquartile range (IQR) is a measure of the dispersion of a dataset. It is calculated as the difference between the 75th percentile (Q3) and the 25th percentile (Q1) of the data and is a way to identify the spread of the middle 50% of the data....
The range is the difference between the largest and smallest values in a group of observations. To calculate the range, you need to find the dataset's smallest and largest values. Then subtract the smallest value from the largest value. In the case o...
In descriptive statistics, several common variation measurements are used to describe the spread or dispersion of a group of observations. Some of the most common measurements of variation include:Range: The range is the difference between the large...
Quantiles are an important statistical concept that allows us to divide data into equal groups. They are often used to identify and analyze data patterns and make meaningful comparisons between different datasets. In this quick guide, we'll cover th...
ISO 9001:2015 is the latest version of the internationally recognized standard for quality management systems. This standard outlines the requirements for an organization to establish, implement, maintain, and continually improve a quality management...
In statistics, the mode is a measure of central tendency representing the most frequently occurring value in a data set. For example, if we have the following numbers: 10, 11, 14, 9, 6, 10, the mode would be 10 since it is the most frequently occurr...
The median is a measure of central tendency used to describe a dataset's middle value. The median is the middle value if the dataset has an odd number of values. If the dataset has an even number of values, the median is the average of the two middl...
The mean, or average, is a measure of central tendency used to describe a dataset's typical or average value. To calculate the mean of a dataset, you add up all the values in the dataset and then divide by the number of values. For example, if you h...
Descriptive statistics is a branch of statistics used to summarize and describe the characteristics of a dataset. Descriptive statistics involves calculating summary measures, such as the mean, median, mode, quantiles (generally quartile), range, int...
