Understanding sample sizes Here are a few key terms you’ll

For example, if you asked a sample of 1000 people in a city which brand of cola they preferred, and 60% said Brand A, you can be very certain that between For example, the area between z*=1.28 and z=-1.28 is approximately 0.80. Sign in Transcript Statistics 66,483 views 162 Like this video? Take the square root of the calculated value.