The extraction rate of a certain polymer is known to depend on the reaction temperature and the amount of catalyst used. An experiment was conducted at four levels of temperature and five levels of the catalyst, and the extraction rate was recorded in the following table. Perform an analysis of variance, main and interaction effects. Test forsignificant.

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Amount of Catalyst 0.5% 0.6% 0.78 0.8% 0.9% 50° C 38 57 57 45 59 41 59 61 58 47 60° C 44 56 70 73 61 43 57 69 72 58 70° C 44 56 70 73 61 47 60 67 61 59 80° C 70 55 49 62 65 62 53 47 69 58