Hospital administrators wish to learn the average length of stay of all surgical patients. a statistician determines that, for a 95% confidence level estimate of the average length of stay to within +/- 0.5 days, 50 surgical patients' records will have to be examined. how many records should be looked at to obtain a 95% confidence level estimate to within +/- 0.25 days?

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.