On a certain hot summer day, 392 people used the public swimming pool. The daily prices are $1.25 for children and $2.50 for adults. The receipts for admission totaled to $862.50. How many children and how many adults swam at the public pool that day?

Use the given degree of confidence and sample data to construct a confidence interval for the population mean mu . assume that the population has a normal distribution. a laboratory tested twelve chicken eggs and found that the mean amount of cholesterol was 185 milligrams with sequals 17.6 milligrams. a confidence interval of 173.8 mgless than muless than 196.2 mg is constructed for the true mean cholesterol content of all such eggs. it was assumed that the population has a normal distribution. what confidence level does this interval represent?