1)

Standard Deviationof Means=

Standard Deviationof Population

SQRT (N)

whereN

=

Samplesizefor

determiningmeans

Note:This will be usedin ANOVAand T-TestTheory

2)

Regardlessof the shapeof the distributionof the population,

the distributionof meanswill be morenearly normal.

Larger Sample Size→More nearlyNormal Distributionof Means

MTB > ERASE C1 – C100

MTB > RANDOM

1000 C1 – C4;

SUBC > NORMAL 100 10.

MTB > LET

C100

=

(C1+C2+C3+C4)/4

MTB > DESC C1-C4

C100

MTB > GHISTO C1 – C4

C100;

SUBC > SAME.