Question: 3. 20 tests are selected at random from a collection of data management classes. The overall course mean 75 with a standard deviation of 4.6.

3.

20 tests are selected at random from a collection of data management classes. The overall course mean 75 with a

standard deviation of 4.6. Determined and 99% confidence interval for the following test scores.

3. 20 tests are selected at random from a collection of data

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