Stats, frequency table, histogram     Name:__________________

Triola data
Old Faithful
125 203 205 221 225 229 233 233 235 236 236 237 238 238 239 240 240 240 240 
241 241 242 242 242 243 243 244 245 245 245 245 246 246 248 248 248 249 249 
250 251 252 253 253 255 255 256 257 258 262 264

freq dist, histogram, stats ***

n=___   (one per Chicago commuter?)
mean=_____      median=_____     mode(s)=_________  occur(s) ____ times 
SD s=______

Sketch the boxplot and annotate it with the 5 numbers and IQR:






Extremely asymmetric; long left tail and first quartile.

Outlier cutoffs:______________  (by the <,> 1.5*IQR method)
Outliers:______________________

2*s=_______  mean-2s=______  mean+2s=_____
Which datums are "statistically significant"___________________
 i.e. not within 2 SD of the mean == More than 2 SD from the mean.
 (Look in the Sorted Data and the Freq.Distr. table)


Sketch the histogram of class width of 10:
Annotate each class's bar with its frequency.












***********************************************
The extreme outlier 125 will be discarded along with almost statistically significant pair.
Delete  125 203 205 in the input textbox, click the "Make the freq...."
n=____ (must be 47 to continue)
mean=_______  Did it change a lot?:____   (NB. wrong lesson here...)
SD s=______   Did it change a lot relative to what it was before?:____
IQR=______    Did it change a lot?:____

Sketch the boxplot and annotate it with the 5 numbers and IQR:






Much closer to symmetric!

Does the "stickgram" look normalish?:______

Sketch the histogram of class width of 10 starting at 220:
Annotate each class's bar with its frequency.









Looks normalish?:____
Make the frequency distribution table of this classed data,
include the relative frequencies:














The relative frequencies (always) sum to _______