According to Chemical Engineering, an important property of fiber is its water absorbency. The percent absorbency of 12 randomly selected pieces of cotton fiber was found to be 20 with a standard deviation of 1.5. A random sample of 12 pieces of acetate yielded an average percent of 12 with a standard deviation of 1.25. Determine the t table in three decimal places if we wanted to know if cotton is more absorbent than acetate at a significance level of 0.05.Blank 1 Determine the t calculated in three decimal places. Blank 2 Is there strong evidence that the mean percent absorbency is significantly higher for cotton fiber than for acetate? Assume that the percent absorbency is approximately normally distributed and that the population variances in percent absorbency for the two fibers are the same. yes or no. Blank 3

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