Now to calculate S(X-bar),AKA S(Between):

MT B > MT B > MT B > MT B > MT B >

Name C11 'Grpmeans' Let C11 (1) = Mean (C2) Let C11 (2) = Mean (C3) Let C11 (3) = Mean (C4) Desc C11

N
3

Min 49.355

Mean 50.246

Max 51.901

Median
49.481

Q1
49.355

T RMean
50.246

Q3
51.901

StDev
1.435

SeMean
0.829

Grpmeans

Grpmeans

T he Stdev above, 1.435, should be the S(X-bar)
Sample size is 25, so S(Population) = S(X-bar) * Sqrt (25):

MT B >Name C12 'Spopest'
MT B >Let C12 = 5 * Stdev (C11)
MT B >PrintC12
Spopest
7.1752

To know whether our model is correct,we determine whether the two estimates ofS-Population are roughly the same,or are significantly different.