A Suppose you are told that a 95% confidence interval for the average price of a gallon of regular gasoline in your state is from$3.35to$3.80. Use the fact that the confidence interval for the mean is in the formxEtox+Eto compute the sample mean and the maximal margin of errorE. (Round your answers to two decimal places.)

x= $

E= $

B A research group conducted an extensive survey of2933wage and salaried workers on issues ranging from relationships with their bosses to household chores. The data were gathered through hour-long telephone interviews with a nationally representative sample. In response to the question, "What does success mean to you?"1500responded, "Personal satisfaction from doing a good job." Letpbe the population proportion of all wage and salaried workers who would respond the same way to the stated question. Find a 90% confidence interval forp. (Round your answers to three decimal places.)

What are the upper and lower limits?