ADMS 2320 Study Guide - Final Guide: Bias Of An Estimator, Confidence Interval, F-Test

• School: York University
• Department: Administrative Studies
• Course: ADMS 2320
• Professor: Mark

Document Summary

There is enough evidence to infer that the mean weight of new product is different from 180 lbs. We estimate with 95% confidence the mean weight of new products lies between 178. 0667lbs and. There is not enough evidence to infer that the standard deviation is less than. Sample size to estimate : determine the sample size necessary to estimate a population mean to within 5 with 95% confidence given that the population standard deviation is 25. n. Sample size to estimate p , (if p is unknown, use 0. 5) Ex: determine the sample size necessary to estimate a population proportion to within 0. 03 with 90% confidence given that a sample proportion of 80%. 1 df (v) = n1 + n2 - 2 n. Is a more than 8% smaller than b. 0. 0022 < . 01( ) p-value< ,reject h0. Conclusion: reject h0, there is sufficient evidence the mean gpa now exceed the mean 10 years ago.