8. Consider each situation described. Identify the population and the sample, explain what p and represent, and tell whether the methods of this chapter can be used to create a confidence interval.

a) A total of 240 potato plants in a field in Maine are randomly checked, and only 7 show signs of blight. How severe is the blight problem for the U.S. potato industry?

b) Concerned about workers’ compensation costs, a small company decided to investigate on-the-job injuries. The company reported that 12 of their 309 employees suffered an injury on the job last year. What can the company expect in future years?