The real estate industry claims that it is the best and most
The real estate industry claims that it is the best and most effective system to market residential real estate. A survey of randomly selected home sellers in Illinois found that a 95% confidence interval for the proportion of homes that are sold by a real estate agent is 69% to 81%. Four interpretations are offered below. Three are incorrect and one is correct. Find the three incorrect interpretations and explain the error in each of them.
1. We are 95% confident, based on this sample, that between 69% and 81% of all homes in Illinois are sold by a real estate agent.
2. We are 95% confident that between 69% and 81% of homes in this survey are sold by a real estate agent.
3. 95% of all homes in Illinois are sold by a real estate agent.
4. 95% of all random samples of home sellers in Illinois will show that between 69% and 81% of homes are sold by a real estate agent.