Source GL SC Sec. SC Adjust. CM Adjust. F P

Fiber $46\mathrm{.}40306\mathrm{.}40301\mathrm{.}600717\mathrm{.}450\mathrm{.}000$

Chemist$316\mathrm{.}481516\mathrm{.}48155\mathrm{.}493859\mathrm{.}880\mathrm{.}000$

Error $121\mathrm{.}10101\mathrm{.}10100\mathrm{.}0917$

Total $1923\mathrm{.}9855$

$S=0\mathrm{.}302903R-$squared. $=95\mathrm{.}41\%R-$squared adjusted$)=92\mathrm{.}73\%$

Figure $2.$ Analysis of Variance for resistance

Group information using Tukey's method and a confidence of $95\mathrm{.}0\%$

Chemical N Mean Grouping

$4,5,3\mathrm{.}5,A$

$2,5,1\mathrm{.}8,B$

$3,5,1\mathrm{.}4,BC$

$1,5,1\mathrm{.}1,C$

Means that do not share a letter are significantly different.

Simultaneous Tukey tests

Response variable Resistance

All two$-$to$-$two comparisons between Chemist levels

Chemical $=1$ subtracted from:

Chemical Mean Difference EE Difference T Value Adjusted P Value

$2,0\mathrm{.}6200,0\mathrm{.}1916,3\mathrm{.}236,0\mathrm{.}0314$

$3,0\mathrm{.}2400,0\mathrm{.}1916,1\mathrm{.}253,0\mathrm{.}6075$

$4,2\mathrm{.}3200,0\mathrm{.}1916,12\mathrm{.}110,0\mathrm{.}0000$

Chemical $=2$ subtracted from:

Chemical Mean Difference EE Difference T Value Adjusted P Value

$3,-0\mathrm{.}3800,0\mathrm{.}1916,-1\mathrm{.}984,0\mathrm{.}2470$

$4,1\mathrm{.}7000,0\mathrm{.}1916,8\mathrm{.}874,0\mathrm{.}0000$

Chemical $=3$ subtracted from:

Chemical Mean Difference EE Difference T Value Adjusted P Value

$4,2\mathrm{.}080,0\mathrm{.}1916,10\mathrm{.}86,0\mathrm{.}0000$

Figure $3.$ Tukey's simultaneous tests.