This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: COMPARING A SAMPLE STATISTIC (Mean) TO A POPULATION PARAMETER (Mean) This is when you draw a sample, calculate a mean for a variable, then want to compare that mean to some other value such as a known or stated national value or a population value. Exercise #1 in the back of Chapter 9 is a good example of this. National mean or = 13.5 National Standard deviation or = 7.6 N=150 = 10.9 Α=0.01 (alpha) IF WE ARE ASKING IF THERE IS SIMPLY A DIFFERENCE THE NULL AND RESEARCH HYPOTHESES ARE AS FOLLOWS AND YOU USE A TWO TAIL TEST : H :There is no difference between the national mean and the sample mean or = 13.5 H 1 :There is a difference between the national mean and the sample mean or ≠ 13.5 IF WE ARE ASKING IF THE SAMPLE MEAN IS LESS THAN THE POPULATION MEAN THE NULL AND RESEARCH HYPOTHESES ARE AS FOLLOWS AND YOU USE A ONE TAIL TEST : H :There is no difference between the national mean and the sample mean or = 13.5 H 1 :There is a difference between the national mean and the sample mean or...
View
Full
Document
This note was uploaded on 07/13/2011 for the course SOC 301 taught by Professor Heberle during the Spring '11 term at University of Louisville.
 Spring '11
 Heberle

Click to edit the document details