1. The quality control manager at a light-bulb factory needs to estimate the mean life of a new type of light-bulb. The population standard deviation is assumed to be 50 hours. A random sample of 30 light-bulbs shows a sample mean life of 475 hours. Construct and explain a 90% confidence interval estimate of the population mean life of the new light-bulb.2. A survey of first-time home buyers found that the sample mean annual income was $46,000. Assume that the survey used a sample of 20 first-time home buyers and that the sample standard deviation was $1,200. Compute and explain a 95% confidence interval estimate of the population mean.3. A telephone poll of 750 American adults asked where would you rather go in your spare time? One response, by 275 adults, was the Mall. Compute and explain a 99% confidence interval estimate of the proportion of all American adults who would respond the Mall.4. For problem #1 above, what size sample would be needed to achieve a margin of error of 15 hours or less?
The objective of this assignment is to enable you to demonstrate your understanding of federal and state court authority, structures, and functions. Write an
The objective of this assignment is to enable you to demonstrate your understanding of federal and state court authority, structures, and functions. Write an essay of 3-5 pages in which you respond to