Sixteen determinations of the ratio of iodine to silver in four different silver preparations were made, with the following results:
Preparation A
|
Preparation B
|
Preparation C
|
Preparation D
|
1.176422
|
1.176441
|
1.176429
|
1.176449
|
1.176425
|
1.176441
|
1.176420
|
1.176450
|
1.176440
|
1.176448
|
1.176437
|
1.176453
|
1.176437
|
1.176453
|
1.176459
|
1.176457
|
a. Construct the ANOVA table for these data.
b. Test the null hypothesis that effects due to the different preparations are not significantly different. If H_0 is rejected, estimate the four preparation effects. Use .05 for alpha