ANOVA test is conducted to test whether 4 brands of steel have equal strength or not, The value of "F" is 12.56, and F critical value is 12.65; Accordingly our conclusion will be: Select one: The four brands have different strength on average. The four brands have different strength on average. All answers are wrong All answers are wrong At least one of the four brands has different strength on average. At least one of the four brands has different strength on average. The four brands have equal strength on average.

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