Question: A study of computer-assisted learning examined the learning of "Blissymbols" by children. Blissymbols are pictograms that are sometimes used to help learning-impaired children communicate. The researcher designed two computer lessons that taught the same content using the same examples. One lesson required the children to interact with the material while in the other the children controlled only the pace of the lesson. Call these two styles "Active" and "Passive". Children were assigned at random to Active and Passive groups. After the lesson, the computer presented a quiz that asked the children to identify 56 Blissymbols. Here are the numbers of correct identifications for each group:

1. Is there good evidence that active learning is superior to passive learning?
2. Compute the 90% confidence interval for the difference in the mean number of Blissymbols identified correctly by children after active and passive lessons.
3. Give the 90% confidence interval for the mean number of Blissymbols identified correctly by children after the active lessons.

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