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There are many:Range,

Inter-quartile range,

Percentile ranges

Mean absolute deviation from the mean or median

Variance

Standard deviation

Standardised deviation


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Q: What is numerical measures of dispersion?
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What do you mean by measures of central tendency and dispersion?

Common measures of central tendency are the mean, median, mode. Common measures of dispersion are range, interquartile range, variance, standard deviation.


Why are three different measures needed in math measures of central tendency and dispersion?

There are more than three measures. Some are better than others in some situations but not as good in other situations.


Why is range not a measure of central tendency?

Measures of central tendency are averages. Range , the difference between the maximum and the minimum, is a measure of dispersion or variation.


What are measures of dispersion in healthcare?

It's a statistical tool used in psychology. A simple way of calculating the measure of dispersion is to calculate the range. The range is the difference between the smallest and largest value in a set of scores. This is a fairly crude measure of dispersion as any one high or low scale can distort the data. A more sophisticated measure of dispersion is the standard deviation which tells you how much on average scores differ from the mean.


Why is standard deviation called the best of all measures of dispersion?

standard deviation is the best measure of dispersion because.. a)It measure the absolute dispersion b)It is most frequentlyused as prossesses almost all the the qualities that a good measure of variation have. c)It is beased on all observation. d)It is rigidly defined. e)It is capable of further algebraic treatment. f)It is least affected by the fluctuation of sampling.