Make & describe a stemplot for the
following weights in pounds
229
246
320
214
197
347
202
247
198
360
218
406
223
628
347
260
414
276
261
196
Histograms
Histogram: Class width
28
32
44
21
45
38
40
22
Range = Largest – Smallest
Range
width =
#classes
mpg of cars:
27
21
23
25
25
25
23
22
24
27
29
28
22
38
18
26
33
27
52
43
Establishing Classes
*You don’t have to use that process!
*You can pick anything that makes
sense…as long as the class sizes are of
equal size.
Salaries of CEO’s (nearest thousand):
250
621
262
750
368
659
862
204
206
149
350
242
145
396
572
# credit card returns:
36
57
75
73
32
49
63
35
35
35
47
39
28
42
41
24
Using the calculator
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Put data in L1
Go to 2nd y=
Turn on, turn on histogram (make sure xlist is
L1 or whatever list your data is in)
Hit zoom9
Go to window. Set xmin to smallest value
and scl = class width.
Press graph. (Trace will show all values)
Homework
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Worksheet (1-3)