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## MAP Recommended Practice

### Course: MAP Recommended Practice>Unit 55

Lesson 5: Box and whisker plots

# Interpreting box plots

AP.STATS:
UNC‑1 (EU)
,
UNC‑1.L (LO)
,
UNC‑1.L.1 (EK)
,
UNC‑1.L.2 (EK)
Learn how to evaluate what we know and what we don't know about a dataset given its box plot.

## Want to join the conversation?

• quartile: The values that divide a list of numbers into quarters.
• i am very confused where did he get precents from
• Think of the box-and-whisker plot as split into four parts (the first, second, third, and fourth quartiles), making each part equal to 1/4 (essentially 25%) of the plot.

As shown in the video, there are three quartiles that have values larger than ten; that means that 3/4 of the quartiles have kids older than 10. In other words, 75% of the plot accounts for kids 10 and older (since 3/4 can be written as 75%).

The fact that every quartile is 25% is a guestimate; the point is that all three quartiles should add up to at least 75% of the plot.

Hope this clears things up!😄
• Am I the only one who is confussed out of there mind! ;-;
• Kind of, once you understand Median the rest of the plot falls into place.
(1 vote)
• At , Isn't there 50% on one side of the median and 50% on the other so technically isn't 13 still in the middle so therefore it would be true? Thanks!
• the sign with the curly = sign means that it is approximated, so he can't be sure that it is truly 50% on that side, on the flip side, because we don't know, it might as well be like that.
• I do not get the last statement. We DO know that exactly half of the students are older than 13, because 50% is on the right side of the median which is also 13. Don't we?
• If he'd said that exactly 50% ARE 13 or older, that would be true, because it includes the median.

For example, if i say that 5 is greater than 10/2, that would be false. Because 10/2 is 5, but i said it was GREATER. On the other hand, if i said that 5 >= 10/2 (greater or equal to), that would be true.
• At , when he says that it is the second quartile, wouldn't that be Q1 and the median be Q2?
• No, this is because the first quartile is the line before the box.
(1 vote)
• Can yall stop posting the transcript.