The number of adult passengers on a bus (excluding the driver) is three times the number of children. if there are a adult passengers on the bus, which expression shows the total number of people on the bus, including the driver? a. 1/3a+a+1. b.3a+a+1. c. 3a+a-1. d.1/3a+a+1

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?