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Standard deviation The concept of Standard deviation was introduced by Karl Pearson in 1893. In Statistics, Standard deviation is the measure of dispersion of a set of data from itsmean. It measures the absolute variability of a distribution or how much your data is spread outaround the mean or average. More precisely, Standard deviation is … Read more
What is Variance Variance is one of the important measure of dispersion. it is also called a measure of spread of data from mean. According to Layman, it is a measure of how far a set of data (numbers) are spread out from their mean (average) value. The more the value of variances, the data … Read more
What is the range? Range in statistics: It is the simplest method of measurement of dispersion. Range defines the difference between the largest and the smallest value or observation or item in a given data distribution.Range = Largest value (L) – Smallest value (S) Merits/Advantages The prime advantage of this measure of dispersion is that … Read more
Measure of dispersion Measure of dispersion In statistics, dispersion (also called variability, scatter, or spread) is the extent to which a data distribution is stretched or squeezed. In other words, dispersion is the extent to which values in a distribution differ from the average of the distribution. It gives us an idea about the extent … Read more
In statistics, a central tendency is a central value or a typical value for a probability distribution. It is occasionally called an average or just the center location/center of the distribution. The most common measures of central tendency are Mean, Median and Mode Measures of central tendency are defined for A Population (large set of … Read more
Statistics is defined as the science of Collecting, Organizing, Summarizing, Presenting, Analyzing, and Interpreting the Data as well as deriving valid conclusions and making reasonable decisions on the basis of this analysis. Statistical approaches Descriptive statistics and is used to analyze a collection of data without assuming any underlying structure for such data. Inferential statistics … Read more
What is Biostatistics? Biostatistics is a branch of applied statistics applied in many areas of Biology including Epidemiology, Medical sciences, Health Sciences, Pharmaceutical Sciences, and Environmental sciences. Adolphe Quetelet (1796-1874)- The first scientist to introduce biostatistics concepts who in his work combined the theory and practical methods ofstatistics in biological and medical applications. Francis Galton … Read more
What is Statistics? Statistics is defined as the science of Collecting, Organizing, Summarizing, Presenting, Analyzing, and Interpreting the data as well as deriving valid conclusions and making reasonable decisions on the basis of this analysis. The word statistics is derived from the Latin word STATUS or the Italian word STATISTA or the German word STATISTIC … Read more