Arithmetic Mean

The arithmetic mean,’ mean or average is calculated by summ­ing all the individual observations or …

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Percentiles

Percentile is in everyday use, but there is no universal definition for it. The most …

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Quartile Deviation

The Quartile Deviation is a simple way to estimate the spread of a distribution about …

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Median Characteristics, Applications and Limitations

The median of a set of data values is the middle value of the data …

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Mode: Characteristics, Applications and Limitations

The mode is a statistical term that refers to the most frequently occurring number found …

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Simple and Weighted average

Simple Averages Simple average of a set of values is determined by dividing the sum …

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Measures of Central Tendency

Measures of Central Tendency or Averages have been defined differently by different statisticians. “A measure …

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Classification and Tabulation, Objects, General rules for the construction of tables

Tabulation is the systematic arrangement of the statistical data in columns or rows. It involves …

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Methods and instruments of data collection

Quantitative data collection methods typically use standardized response categories. Surveys are the most common example. …

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Methods of Sampling

Probability Sampling Techniques Random Sampling When: There is a very large population and it is …

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