Statistics
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“Statistics are numerical statements of facts in any department of enquiry placed in relation to each other.”
Average
“Statistics may rightly be called the science of averages “
Secondary Sources (Data)
“It is never safe to take published statistics at their face value without knowing their meanings and limitations, and it is always necessary to criticize arguments that can be based on them.”
Dispersion
“Dispersion is the measure of the variation of the item”