شرح بالعربى Measures of position

Deciles
are similar to quartiles. But where quartiles split the data in four equal parts, deciles split the data into ten parts: The 10th, 20th, 30th, 40th, 50th, 60th, 70th, 80th, 90th and 100th percentiles.
Percentiles
is a number where a certain percentage of scores fall below that number. For example, a 90th percentile marks the spot where 90% of values fall below that cut-off point.
Quartiles
Simply put, quartiles divide your data into quarters: the lowest quarter, two middle quarters, and a highest quarte

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