Standard Deviation-Mean Plot
Section	Mean	Standard Deviation	Range
1	30.55	5.1565492337415	12.4
2	39.375	2.79210195611359	6.2
3	33.875	4.27190433725600	10
4	29.275	5.12924620842738	11.9
5	39.5	2.69567554922076	6.2
6	34.325	4.16122978617299	9.6
7	28.9025	4.86747282135881	11.75
8	38.815	2.8386088141905	6.06
9	35.1825	3.75518641348203	8.11
10	28.35	5.81807528311554	14.2
11	37.625	2.1868927728629	5.2
12	32.5	3.31963853453957	6.9
13	28.275	5.27027829752218	12.8
14	37.975	2.47706143107783	5.4
15	35.025	4.01777301499226	8.7
16	29.65	5.81349005904944	14.2
17	39.025	1.26062153982338	2.9
18	35.175	3.69357550349252	8.1
19	31.225	5.99520641846467	14.6
20	40.175	2.72075357208256	6
21	37.525	3.58736207632665	8.1

Regression: S.E.(k) = alpha + beta * Mean(k)
alpha	13.8127326629574
beta	-0.288289457375549
S.D.	0.0330560727425902
T-STAT	-8.7212252834896
p-value	4.54388765704303e-08

Regression: ln S.E.(k) = alpha + beta * ln Mean(k)
alpha	10.6783439088593
beta	-2.65752594239898
S.D.	0.407054296795821
T-STAT	-6.52867679648153
p-value	2.97609083017909e-06
Lambda	3.65752594239898