Ana bikes for 5.5 hours. she covers a distance of 57.75 mi. assuming she bikes at a constant speed, how fast was ana biking?

a 5.5 mi/h

b 7.5 mi/h

c 9.5 mi/h

d 10.5 mi/h

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?