Acar dealer who sells only late-model luxury cars recently hired a new salesperson and believes that this salesperson is selling at lower markups. he knows that the long-run average markup in his lot is $5,600. he takes a random sample of 16 of the new salesperson's sales and finds an average markup of $5,000 and a standard deviation of $800. assume the markups are normally distributed. what is the value of an appropriate test statistic for the car dealer to use to test his claim?

While cell phones with holographic keyboards are currently in the introduction stage of the industry life cycle, tablet computers are in the growth stage. in the context of this scenario, which of the following statements is true? a. the industry for cell phones with holographic keyboards will face greater competition than the tablet industry. b. while the industry for cell phones with holographic keyboards will focus more on product innovation, the tablet industry will focus more on process innovation. c. while the industry for cell phones with holographic keyboards can reap the benefits of economies of scale, the tablet industry will experience no such benefits. d. the industry for cell phones with holographic keyboards will face price competition, whereas, in the tablet industry, the mode of competition will be non-price.