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Example 157 part A
Lecture Examples
Example 157: The results of a CRD experiment for corn crop yields are given below. The multiple comparison intervals to compare the treatments A, B, C, and D were provided by SPSS. Using the SPSS output below, rank the treatments from lowest to highest, express the results in a diagram using bars to join the means that are not significantly different, and form a confidence interval for the true mean yield (in tons) for the highest of the four treatments.
Treatments 
Yields 

A 
3.7 
3.6 
3.5 
3.5 
B 
1.2 
3.4 
3.1 
2.5 
C 
0.5 
1.0 
0.7 
0.6 
D 
1.3 
3.0 
3.3 
2.6 
Source 
DF 
SS 
MS 
F 
Pvalue 
Treatments 
3 
17.212 
5.737 
12.875 
0.0005 
Error 
12 
5.348 
0.446 


Total 
15 
22.56 


