STAT 222 class notes ( ch 8-14 )

,Day Sunday
:


21 can 20211


* Don't forget your calc
* if I am never absentI 39to-
bonus

get

Stat
stat stat
I 2
Descriptive Inference
as Jy5e

·
histogram .... etc




=>averaene

, Day :Tuesday Date : January 2024
23.




population Calculations -
parameter

Sample Calculations D Statistics




Population sample
-




M
Meanlaverage
-



populationmean X >
-
sample mean



2 2
6 variance S


62 = 6 standard deviation S2 =
S
Th
proportion/percentage *
H
P




* bench mark the when standard deviation
our is mean
Comparing

, x=
standard normal distribution

tabletribution sample population
means mean


X-M-
-




standardized Z =




population standard ,
6/Nh sample size
deviation