# Question: According to an article from HuffingtonPost com some experts believe that

According to an article from HuffingtonPost.com, some experts believe that 20% of all freshwater fish in the United States have such high levels of mercury that they are dangerous to eat. Suppose a fish market has 250 fish we consider randomly sampled from the population of edible freshwater fish. Use the Central Limit Theorem (and the Empirical Rule) to find the approximate probability that the market will have a proportion of fish with dangerously high levels of mercury that is more than two standard errors above 0.20.You can use the Central Limit Theorem because the fish were randomly sampled; the population is more than 10 times 250; and n times p is 50, and n times (1 minus p) is 200, and both are more than 10.

## Relevant Questions

According to the Oregon Bar Association, approximately 65% of the people who take the bar exam to practice law in Oregon pass the exam. Find the approximate probability that at least 67% of 200 randomly sampled people taking ...A large community college district has 1000 teachers, of whom 50% are men and 50% are women. In this district, administrators are promoted from among the teachers. There are currently 50 administrators, and 70% of these ...In a simple random sample of 1500 young Americans, 87% had earned a high school diploma. a. What is the standard error for this estimate of the percentage of all young Americans who earned a high school diploma? b. Find the ...In the 1960 presidential election, 34,226,731 people voted for Kennedy; 34,108,157 for Nixon; and 197,029 for third-party candidates (www.uselectionatlas.org). a. What percentage of voters chose Kennedy? b. Would it be ...Refer to Exercise 7.67 for information. This data set records results just for the boys. a. Find and compare the percentages that graduated for each group, descriptively. Does this suggest that preschool was linked with a ...Post your question