What is the correct interpretation of two-population mean confidence interval given below? A 99% confidence level was used. (-35.9 mg , +13.4 mg) Group of answer choices We are 99% confident that the mean average of population 1 is between 13.4 mg and 35.9 mg lower than the mean average of population 2. We are 99% confident that there is no significant difference between the population mean averages. We are 99% confident that the mean average of population 1 is between 13.4 mg and 35.9 mg higher than the mean average of population 2