The U.S. Army Corps of Engineers data on a sample of 144 contaminated fish collected from the

Question:

The U.S. Army Corps of Engineers data on a sample of 144 contaminated fish collected from the river adjacent to a chemical plant. Estimate the proportion of contaminated fish that are of the channel catfish species. Use a 90% confidence interval and interpret the result.
For Information: Refer (Example 1.5.)