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Performing an ANOVA<br />
Analyzing Data<br />
5 Click Graphs.<br />
For many statistical commands,<br />
MINITAB includes built-in<br />
graphs that help you interpret<br />
the results and assess the validity<br />
of statistical assumptions.<br />
6 Check Individual value plot<br />
and Boxplots of data.<br />
7 Under Residual Plots, choose<br />
Four in one.<br />
8 Click OK in each dialog box.<br />
Session<br />
window<br />
output<br />
One-way ANOVA: Days versus Center<br />
Source DF SS MS F P<br />
Center 2 114.63 57.32 39.19 0.000<br />
Error 299 437.28 1.46<br />
Total 301 551.92<br />
S = 1.209 R-Sq = 20.77% R-Sq(adj) = 20.24%<br />
Individual 95% CIs For Mean Based on<br />
Pooled StDev<br />
Level N Mean StDev -----+---------+---------+---------+----<br />
Central 99 3.984 1.280 (----*---)<br />
Eastern 101 4.452 1.252 (----*----)<br />
Western 102 2.981 1.090 (----*---)<br />
-----+---------+---------+---------+----<br />
3.00 3.50 4.00 4.50<br />
Pooled StDev = 1.209<br />
Tukey 95% Simultaneous Confidence Intervals<br />
All Pairwise Comparisons among Levels of Center<br />
Individual confidence level = 98.01%<br />
Center = Central subtracted from:<br />
Center Lower Center Upper ---------+---------+---------+---------+<br />
Eastern 0.068 0.468 0.868 (---*---)<br />
Western -1.402 -1.003 -0.603 (---*---)<br />
---------+---------+---------+---------+<br />
-1.0 0.0 1.0 2.0<br />
<strong>Meet</strong> MINITAB 3-5
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