You may need to use the appropriate appendix table or technology to answer this question. Barron's reported that the average number of weeks an individual is unemployed is 18.5 weeks. Assume that for the population of all unemployed individuals the population mean length of unemployment is 18.5 weeks and that the population standard deviation is four weeks. Suppose you would like to select a sample of 50 unemployed individuals for a follow-up study. (a) Show the sampling distribution of x, the sample mean average for a sample of 50 unemployed individuals. A bell-shaped curve is above a horizontal axis labeled weeks. The horizontal axis ranges from about 48.2 to about 51.8. The curve enters the viewing window near 48.2 just above the horizontal axis, curves up to the right, and reaches a maximum near 50. The curve then curves down and to the right until it leaves the viewing window at the same height it entered near 51.8. A bell-shaped curve is above a horizontal axis labeled weeks. The horizontal axis ranges from about -1.8 to about 1.8. The curve enters the viewing window near -1.8 just above the horizontal axis, curves up to the right, and reaches a maximum