Question: With reference to the Example 8, Chapter 8, test the equality of the variances for the two aluminum alloys. Use the 0.02 level of significance.

With reference to the Example 8, Chapter 8, test the equality of the variances for the two aluminum alloys. Use the 0.02 level of significance.

Data From Example 8

EXAMPLE 8 Graphics to accompany a two sample t test Example 7,

Chapter 2, presents strength measurements on an aluminum alloy. A second alloy

yielded measurements given in the following stem-and-leaf display. Find a 95% confidence

EXAMPLE 8 Graphics to accompany a two sample t test Example 7, Chapter 2, presents strength measurements on an aluminum alloy. A second alloy yielded measurements given in the following stem-and-leaf display. Find a 95% confidence interval for the difference in mean strength 8.

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