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AP Statistics 2.1 Exploring Data. How does this change affect the mean, standard deviation, and IQR?
AP Statistics 4.4 Exploring Data 12 Views
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AP Statistics 4.4 Exploring Data. Box plots do not allow us to compare...what?
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]
Full Transcript
- 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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