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13. The 3rd Quartile score is the 9th score. How many scores are there in the set of ungrouped data?


Sagot :

thus, there are 12 score in the set of ungrouped data.

first substitute the quartile into decile

3rd Quartile=75th percentile=75%

then divide 9th score by 75%

=9/.75

=12 scores