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AP Statistics Notes
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,CH1 Notes, CHI. NOTES
Statistics:the data collected from the Sample
Parameter:the data collected from the population
The
*
question will show the word 'sample' or 'population'
variables
variables categorial variable like a lable exgrade
I
-
-
nominal (no logical orders
-
Ordinal exsworst, bad, normal, okay, great)
Quantitative Variable
-
Continuous:thatcan have decimal
-
Discrete:that
can't
have decimal (whole number)
exs number of siblings->D
how many books have a read->D
distance from school to home -> C
individual:an object
described in a data
ex) animal, people
Two Bar Graph
-> relative
-
frequency percentage)
(vertical scale:
3 relative to the group
..... ...... even
* the one variable has the bigger percentage, the numbe
~////r
/ -r the
of group may change the result.
1100 people) 1500 people)
Mosaic plot
↳ width of the each rectangle is proportional to the number of individuals
2 width depends on number of individuals.
, Dotplot
:
↳
shows each data value as a dotabove its location on a numberline
... a
shapes 01 2 3 4
is if the right side of the graph is approximately a mirror
image of the left
side, symmetric
......Peakmodes
01 2 3 4
----
2) If the right side of the graph is much than the left side, right
skwed
: is
-
when the graph is sawed
*
to right, mean, median
-> Q-med> Min-Q,
3) If the left
side of the graph is much longer than right side, leftsawed
......
012345
-
when
* the graph is skied to left, median, mean
& Min-Q.Qu-med
additional
e m
unimodal
bimodal approximately
symmetric
(=normal)
stemplot
stem:consists of all but
the final digit
[ Leaf:the final digit
Order -
Stems are ordered from lowestto highestand arranged in a vertical column
-
the leaves are arranged in increasing order from
out the appropriate stem
ex) how many pairs of shoes do you have]
2, 4, 1, 16, 9, 10,7
0 2, 4, 1,9,7
⑧ 0 1, 2, 4, 7,9
I 16,0 10,6
Stems add leaves
order leaves
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