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The important things i found in this lesson are​

User Austyn
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Answer:

The first quartile, denoted by

Q1 , is the median of the lower half of the data set. This means that about 25% of the numbers in the data set lie below and about 75% lie above .

The third quartile, denoted by Q3 , is the median of the upper half of the data set.

Step-by-step explanation:

User Demian Flavius
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