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Assignment 2 Action Plan to Address Drunk Driving

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Analyzing with ANOVA |
Two-Way |
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Submit your answers to the following questions using the ANOVA source table
below. The table depicts a two-way ANOVA in which gender has two groups
(male and female), marital status has three groups (married, single never
married, divorced), and the means refer to happiness scores (n = 100):
a. What is/are the independent variable(s)? What is/are the dependent
variable(s)?
The independent variables are gender and marital status. The dependent variable
is the happiness.
b. What would be an appropriate null hypothesis? Alternate hypothesis?
Alternate hypothesis about gender can be that females will have greater
happiness mean score than males. There is also an alternative hypothesis in
marital status that females who are married would have lower happiness mean
scores than males that are married. The Null hypothesis in both situations would
be that differences would not exist.
c. What are the degrees of freedom for 1) gender, 2) marital status, 3) interaction
between gender and marital status, and 4) error or within variance?
ANSWERS
1. A-1= There are 2 groups of gender; male and female, so it would be 2-1=1 as
the degree of freedom.

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2. B-1= There are 3 groups for marital status; married, single, and divorced, so
it would be 3-1=2 as the degree of freedom.
3. (A-1)*(B-1) = That would be the answer from gender (1)* The answer from
marital status (2) which would be 1*2=2 for the degree of freedom.
4. N-AB= That would be the total number of observations which is given as
N=100 minus gender*marital status. This would be; 100-6=94 for the error.
d. Calculate the mean square for 1) gender, 2) marital status, 3) interaction
between gender and marital status, and 4) error or within variance.
5. Sum of squares due to effect A/degrees of freedom of effect A=____. This
would be 68.15/1= 68.15 for the mean square

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