1. Presume that the following data were collected fromrespondents to a poll asking for their rating of the current stateof the economy, ranging from 1 to 100 (1= worst, 100 = best).
| Party affiliation |
Republican | Independent | Democrat |
M | 45 | 41 | 31 |
s | 9.1 | 8.7 | 10.3 |
n | 15 | 13 | 19 |
1). State your hypotheses for the effect of partyaffiliation:
     H0:
     H1:
2). Test your hypothesis using a one-way ANOVA. Show all yourwork andenter your information in the appropriate boxes:
MSB:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
MSW:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
F:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
df:             ,      Â
Fcrit:Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
3). What is your conclusion regardingH0?   (Circle one):   RETAIN    REJECT
4). What is your conclusion regarding the researchhypothesis?
2. In an ANOVA, what do “within-groups variability†and“between-groups variability†mean?
3. Describe how the F-distribution is different than thet-distribution. There is at least one feature that they share incommon, however (and the z-distribution does not have thisfeature). What is it?
