ITEC 1010 Study Guide - Final Guide: Confidence Interval

• School: York University
• Department: Information Technology
• Course: ITEC 1010
• Professor: Marina Erechtchoukova

Document Summary

In the baseball data set discussed in the last exercise, it was found that outof the 59 baseball players, 15 were left-handed. Answer by using (4. 2. 7) to constructa 95% approximate confidence interval for p, the proportion of left-handed baseballplayers. The number of left-handed base-ball players in the sample, x = 15. The number of base-ball players in the sample, Then, the sample proportion of left-handed base-ball players, The 95% confidence interval for the proportion of left-handed baseball players is given by. Here is the critical value of z at level of significance. Find the 95% confidence interval for sample proportion. The critical value of z corresponding to 95% confidence level is 1. 96. Then, substitute the values in the confidence interval formula. Hence, the 95% confidence interval for sample proportion of left-handed baseball players is. It is stated that the actual proportion of left-handed males in america is 11%.