San Diego State University Operations And Supply Chain Management Assignment Help - Standard

Question - According to Chemical Engineering an important property of fiber is its water absorbency. The
average percent absorbency of 25 randomly selected pieces of cotton fiber was found to be 20 with a
standard deviation of 1.5. A random sample of 25 pieces of acetate yielded an average percent of 12
with a standard deviation of 1.25. Is there strong evidence that the population mean percent
absorbency for cotton fiber is significantly higher than the mean 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. Use a significance level of 0.05.

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