You are interested in purchasing a new car. One of the many points you wish to consider is the resale value of the car after 5 years of ownership. Since you are particularly interested in the Toyota Camry, you decide to estimate the resale value of the Camry with a 90% condence interval. You manage to randomly obtain data on 17 recently resold 5 year old Toyota Camrys. These 17 cars were resold at an average price of $12,400. Assume the resale value of the Camry after 5 years of ownership is normally distributed. 28. Choose the formula that should be used to calculate the 90% condence interval for the true mean resale value of the Camry after 5 years of ownership. (1) Can't answer this question based on the information given. 29. Pick the appropriate z or t value used in the above interval. O z = 1.64 O t = 1.65 O t = 1.34 O t = 1.75