The local waste management office needs to know the mean amount of trash produced from each household in their district per week. Last week, the office took a random sample of 717 households and found that the mean amount of trash produced per household was 19.5 pounds. Assuming that the standard deviation for the population is 2.3 pounds, construct the 95% confidence interval for the mean amount of trash produced by each household per week.

What is the best point estimate for this problem?