bob tosses his basketball onto the ground from his tree house he tosses the basketball with an initial downward velocity of 8 feet per second. the equation h = -16t^2-8t+20 represents the height h of the basketball aster t seconds. how long does the basketball take to hit the ground?

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?