A researcher computed the mean , median and standard deviation for a set of performance score . If 5 were to be added to each score , which of these three statistics would change ?

Created: 8 years ago | Updated: 2 months ago

Updated: 2 months ago

The mean only

The median only

The standard deviation only

The mean and median only

The mean and the standard deviation only

Bangladesh Bank Bangladesh Bank - Assistant Director - 2011 গণিত পরিসংখ্যান (Statistics) 2011

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When we put additional data in statistical calculation, mean and median changes but it is not necessarily true that the standard deviation will change. Standard deviation may remain the same even after adding additional set of data.

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A researcher computed the mean , median and standard deviation for a set of performance score . If 5 were to be added to each score , which of these three statistics would change ?

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