Q2. A new purification unit is installed in a chemical process. Before its installation, a random sample yielded the following data about the percentage of impurity: X₁-9.85, s-6.79, and n₁-10. After installation, a random sample resulted in X₂=8.08, s²-6.18, and n₂-8. (a) Can you conclude that the two variances are equal? Use a-0.05. (b) Can you conclude that the new purification device has reduced the mean percentage of impurity? Use g=0.05

Q2. A new purification unit is installed in a chemical process. Before its installation, a random sample yielded the following data about the percentage of impurity: X₁-9.85, s-6.79, and n₁-10. After installation, a random sample resulted in X₂=8.08, s²-6.18, and n₂-8. (a) Can you conclude that the two variances are equal? Use a-0.05. (b) Can you conclude that the new purification device has reduced the mean percentage of impurity? Use g=0.05

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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