Wayne mowed lawns for 4 hours and earned $6.20 per hour. Then he washed windows
for 3 hours and earned $5.50 per hour. What were Wayne's average earnings per hour
for all 7 hours?

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?