standard normal

  1. A

    Z Table Rookie Question

    We've been told to find critical value that corresponds to 80% confidence level. I dropped 10% from each tail since it's symmetric. Am I right in proceeding by finding where 0.90 is in the table to find out the right limit and then minus that to find the left-end point hoping it leaves 80% in...
  2. W

    Finding the Target mean?

    Hi, I am taking an online Statistics course, and am having a hard time figuring out how to setup this problem. I would appreciate any help I can get, I am a statistics beginner and want to learn the steps in solving this questions. " San Juan Green Tea is sold in 1/2 liter ( 500 ML) bottles...