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Question: 8 a new filtering device is installed in a chemical...

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8. A new filtering device is installed in a chemical unit. Before its installation, a random sample yielded the following information about the percentage of impurity: 1-125, Sİ-101.17, and n1-8. After installation, a random sample yielded-,-102, S: 94.73, n2 29, (a) Can you concluded that the two variances are equal? Use a 0.05. (b) Has the filtering device reduced the percentage of impurity significantly? Use α= 0.05.

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