Waiting
Login-Verarbeitung ...

Trial ends in Request Full Access Tell Your Colleague About Jove

Chapter 4
Measures of Variation

What is Variation?
Apart from the measures of central tendency, distribution, outliers, and the changing characteristics of data with time, an important characteristic…
Range
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in…
Standard Deviation
The most commonly used measure of variation is the standard deviation. It is a numerical value measuring how far data values are from their mean. The…
Standard Error of the Mean
The sampling variability of a statistic is defined as how much the statistic varies from one sample to another. The sampling variability of a…
Calculating Standard Deviation
The standard deviation is the most common measure of variation. It is a value that tells us how far a data value is from the mean value in a dataset.…
Variance
 The deviations show how spread out the data are about the mean. A positive deviation occurs when the data value exceeds the mean, whereas a…
Coefficient of Variation
The coefficient of variation measures the dispersion of the data points or distribution around the mean. Using the coefficient of variation, we can…
Range Rule of Thumb to Interpret Standard Deviation
The range rule of thumb in statistics helps us calculate a dataset's minimum and maximum values with known standard deviation. This rule is based…
Empirical Method to Interpret Standard Deviation
The empirical rule, also known as the three-sigma rule, allows a statistician to interpret the standard deviation in a normally distributed dataset.…
Chebyshev's Theorem to Interpret Standard Deviation
Chebyshev’s theorem, also known as Chebyshev’s Inequality, states that the proportion of values of a dataset for K standard deviation is…
Mean Absolute Deviation
The mean absolute deviation is also a measure of the variability of data in a sample. It is the absolute value of the average difference between the…
A Cost-effective and Reliable Method to Predict Mechanical Stress in Single-use and Standard Pumps
Pumps are mainly used when transferring sterile culture broths in biopharmaceutical and biotechnological production processes. However, during the…
Precise, High-throughput Analysis of Bacterial Growth
Bacterial growth is a central concept in the development of modern microbial physiology, as well as in the investigation of cellular dynamics at the…
A Small-Scale Setup for Algal Toxicity Testing of Nanomaterials and Other Difficult Substances
Ecotoxicity data is a requirement for pre- and post-market registration of chemicals by European and international regulations (e.g., REACH). The…

Get cutting-edge science videos from JoVE sent straight to your inbox every month.

Waiting X
Simple Hit Counter