A new ltering device is installed in a chemical unit. Before its in.pdf

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A new ?ltering device is installed in a chemical unit. Before its installation, a random sample yielded the follow- ing information about the percentage of impurity: Y-bar-1 =12.5, S^2 sub1=101.17, and n 1= 8. After installation, a random sample yielded Y-bar-2=10.2,S^2 sub2=94.73, n 2= 9. (a) Can you conclude that the two variances are equal? Usealpha= 0.05. (b) Has the ?ltering device reduced the percentage of impurity signi?cantly? Usealpha= 0.05. Solution question is not clear have symbols.

A new ltering device is installed in a chemical unit. Before its in.pdf

••
A
amolsk22
Educación

A new ?ltering device is installed in a chemical unit. Before its installation, a random sample yielded the follow- ing information about the percentage of impurity: Y-bar-1 =12.5, S^2 sub1=101.17, and n 1= 8. After installation, a random sample yielded Y-bar-2=10.2,S^2 sub2=94.73, n 2= 9. (a) Can you conclude that the two variances are equal? Usealpha= 0.05. (b) Has the ?ltering device reduced the percentage of impurity signi?cantly? Usealpha= 0.05. Solution question is not clear have symbols.

A new ltering device is installed in a chemical unit. Before its in.pdf

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A new ?ltering device is installed in a chemical unit. Before its installation, a random sample yielded the follow- ing information about the percentage of impurity: Y-bar-1 =12.5, S^2 sub1=101.17, and n 1= 8. After installation, a random sample yielded Y-bar-2=10.2,S^2 sub2=94.73, n 2= 9. (a) Can you conclude that the two variances are equal? Usealpha= 0.05. (b) Has the ?ltering device reduced the percentage of impurity signi?cantly? Usealpha= 0.05. Solution question is not clear have symbols

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A new ltering device is installed in a chemical unit. Before its in.pdf

  • 1. A new ?ltering device is installed in a chemical unit. Before its installation, a random sample yielded the follow- ing information about the percentage of impurity: Y-bar-1 =12.5, S^2 sub1=101.17, and n 1= 8. After installation, a random sample yielded Y-bar-2=10.2,S^2 sub2=94.73, n 2= 9. (a) Can you conclude that the two variances are equal? Usealpha= 0.05. (b) Has the ?ltering device reduced the percentage of impurity signi?cantly? Usealpha= 0.05. Solution question is not clear have symbols