Make & describe a stemplot for the following weights in pounds

229 247 347

246 198 260

320 360 414

214 218 276

197 406 261

347 223 196

202 628

Histograms

Histogram: Class width

Range = Largest – Smallest

Rangewidth =

#classes

28 32 44 21

45 38 40 22

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

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

Worksheet (1-3)