Psychology 2820E Lecture Notes - Lecture 4: Confidence Interval, Statistical Parameter, Point Estimation

• School: Western University
• Department: Psychology
• Course: Psychology 2820E
• Professor: Richard

Document Summary

We can use the x from the data as a point estimate for the population mean . Confidence interval does not give you a single value for the population parameter, but rather a range of values between which you can state the population parameter falls with a certain level of confidence. In forming the confidence interval for calculate the sample mean, x , and then add to and subtract from this point estimate what is called the bound or margin of error. To determine which column you use, you need to identify the level of confidence you want. Answer must be formatted as: # < < # Sometimes you may want to have a confidence interval that is very accurate or narrow. It is possible to form a confidence interval that has a pre-determined level of accuracy by choosing an appropriate sample size.