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AP Statistics 4.4 Exploring Data. Box plots do not allow us to compare...what?

Language:
English Language

Transcript

00:04

And here's your shmoop du jour brought you by basketball

00:06

players so this thing should be a slam dunk compare the shoe sizes as members [basketball player performs a slam dunk]

00:10

of the girls basketball and boys basketball teams we created two box plots

00:14

however box plots do not allow us to compare what? And here's the potential

00:20

answers... All right so to answer this question we have to do a little boxing [Young boys boxing]

00:25

well a little box plotting anyway, this one's less likely to result in a

00:30

broken nose so that's good and we want to compare shoe sizes here boys versus [boys team and girls team huddled together]

00:34

girls and we want to know what we will not be able to measure let's take these

00:38

one at a time can we measure A; spread, well sure a box plot is one of these

00:42

things they're pretty thorough like someone who does a really great job [Man flossing his teeth]

00:45

flossing and we've heard people like that exist. A box plot shows us just about

00:50

everything we can see the max and min values interquartile range an yeah, the

00:55

whole shebang so obviously if we can see all these different data points we can [finger points to a box plot example]

00:58

get a sense of the spread so adios option A. What about B; outliers? Yep, box

01:03

plots show us those as well usually indicated with asterisk nope box plots

01:08

may also use asterisk to make subtle catty remarks really you have an

01:12

attitude problem okay so it's not B will a box plot show us the medians sure

01:16

a median is the center most data point and that's shown right here and it can't [Median in a box plot highlighted purple]

01:20

be D either because skewness... an actual word we promise, is all about how

01:25

asymmetric our data points are all info we can pick up by looking at the box

01:30

plot this thing is a wealth of information there anything it can't tell [an information and help desk]

01:33

us. Better hope so or else we're going to have to select option F and give up.

01:38

Fortunately for us a box plot cannot tell us the means we've got a good sense

01:42

of the highs and lows and everything in between but because we don't have all [A box plot with a calculation missing several data]

01:45

the data we can't add everything up and divide to find the mean so we'll never

01:50

find out the average foot size of these Behemoths with just a box plot. [A shoe lands on a box plot]

01:56

All right option E is correct next we'd like to see a box plot of a Foxtrot, yep

02:00

probably won't be any different or more interesting [A frying pan sizzling on a hob]

02:04

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