An Analyst wants to know if there was a significance differencein the average of hours worked in a week from 2000 (Group 1) to2004 (Group 2). He gathers all the data from the General SocialSurvey, and lists the following summary statistics from thesampling.
Year | 2000 | 2004 |
Mean | 27.34 | 48.12 |
Std. Dev | 10.11 | 19.23 |
Unweighted n | 43 | 54 |
Source: General Social Survey (sda.berkeley.edu )
What is the correct null hypothesis?
Ho: mu2004-mu2000 < 0
Ho: mu2004-mu2000 does not equal 0
Ho: mu2000-mu2004 > 0
Ho: mu2004-mu2000 = 0
