PLCY 800 Lecture Notes - Lecture 2: Confidence Interval, Standard Deviation, Standardized Test

• School: Simon Fraser University
• Department: Public Policy
• Course: PLCY 800
• Professor: nancy

Document Summary

Find a 95% confidence interval for the mean coverage per liter. What assumptions are you making: the sunny corporation wishes to estimate the proportion of defective units produced on its. The quality control director wants to be at least 99% sure that this proportion is estimated correctly to within plus or minus 0. 02. How large a sample should she take: (a) a random sample of 200 recent university graduates revealed an average student loan of ,400 with a standard deviation of ,500. Independent samples of 30 tires are taken from each production line and tested independently of each other. 30,100 miles for a and 25,200 miles for b. The sample variances are 1,500,000 miles squared for a and 2,400,000 miles squared for b. In a random sample of 1000 residents, it is found that 760 oppose construction of the plant.