Class Notes (834,361)
Canada (508,518)
Todd Alway (64)
Lecture 7

Political Science 3N06 2014 II Lecture 7b.doc

3 Pages
Unlock Document

Political Science
Todd Alway

Political Science 3N06 2014 Lecture 7b: One Sample Hypothesis testing Calculating Z(obtained) when you do not have the population standard deviation (σ) - If you do not know the population standard deviation, you can substitute the sample standard deviation (s) into the Z formula provided - A) You subtract 1 from n to correct for bias - B) The sample size is large enough (100 or more) - If the sample size (n) is less than 100, you cannot calculate Z(obtained) - With small sample sizes you cannot assume that the sampling distribution will be normal like Z - In this case you are required to use a different distribution to calculate areas and probabilities - The t distribution - The higher the df (degrees of freedom) the closer and closer the t distribution resembles the Z distribution - i.e the larger the sample size the closer the curve is to the Z curve 1 - To find the appropriate t(critical) for a given alpha with a given df, use the Table in Appendix B - To find the value of t(obtained) use the formula: - - If the t(obtained)
More Less

Related notes for POLSCI 3N06

Log In


Join OneClass

Access over 10 million pages of study
documents for 1.3 million courses.

Sign up

Join to view


By registering, I agree to the Terms and Privacy Policies
Already have an account?
Just a few more details

So we can recommend you notes for your school.

Reset Password

Please enter below the email address you registered with and we will send you a link to reset your password.

Add your courses

Get notes from the top students in your class.