An experiment was conducted to determine whether additives increase the adhesiveness of rubber...

Question

An experiment was conducted to determine whether additives increase the adhesiveness of rubber products. Sixteen products were made with the new additive and another 16 without the new additive. The observed adhesiveness was as recorded below.

	Temperature (?C)
	50	60	70	80
Without Additive	2.3	3.4	3.8	3.9
2.9	3.7	3.9	3.2
3.1	3.6	4.1	3.0
3.2	3.2	3.8	2.7
With Additive	4.3	3.8	3.9	3.5
3.9	3.8	4.0	3.6
3.9	3.9	3.7	3.8
4.2	3.5	3.6	3.9

Perform an analysis of variance to test for significant main and interaction effects.

Robert · Accepted Answer

Anova: Two-Factor With Replication 
   
       SUMMARY 50 60 70 80 Total 
 Without Additive           
 Count 4 4 4 4 16 
 Sum 11.5 13.9 15.6 12.8 53.8 
 Average 2.875 3.475 3.9 3.2 3.3625 
 Variance 0.1625 0.049167 0.02 0.26 0.

An experiment was conducted to determine whether additives increase the adhesiveness of rubber products. Sixteen products were made with the new additive and another 16 without the new additive. The...

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