It is known that the amount of time needed to change the oil on a car is normally distributed with a standard deviation of 5 minutes. the amount of time to complete a random sample of 10 oil changes was recorded and listed here. compute the 99% confidence interval estimate of the mean of the population.

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]