# Project #43974 - Quantitative Research Design unit 4

1.     Jackson, even-numbered Chapter Exercises, pp. 335-337.

a. How many independents variable are in 4 x 6 factorial design? How many conditions (cells) are in this design?

b. What is the differences between a cell ( Condition) mean ad the means used to interpret a main effect?

d. What is the differences between a complete factorial design and a incomplete factorial design?

e. Explain the difference between a two- story ANOVA and a three-way ANOVA.

f. Complete each of the following ANOVA summary tables. In addition answer the following question for each of the ANOVA summary tables?

1.  What is the factorial notation?

2. How many condition were in the study ?

3. How many subjects were in the study?

4.  Identify significant main effects and

Source    df          SS         MS        F

A          1           60

B          2           40

A x B     2           90

Error      30

Total      35         390

Source    df          SS         MS        F

A          2           40

B          3           60

A x B     6           150

Error      72

Total      83         400

Source    df          SS         MS        F

A          1           10

B          1           60

A x B     1           20

Error      36

Total      39         150

A researcher is attempting to determine the effects of a practice and gender on a timed task. Participants in an experiment are given an computerized search task. They search a computer screen of various characters and attempt to find a particular character, they press a button to stop a timer. Their reaction time in seconds on each trial is recorded. Subjects practice for 2, 4, or 6 hours and are either female or male. The reaction time data for the 30 subjects appear here.

Women               Men

2 Hours                          12                    11

13                    12

12                    13

11                    12

11                    11

4 Hours              10                     8

10                     8

8                       10

7                       9

6 Hours              7                       5

5                       6

7                       8

6                       6

7                       8

Source                df                      SS         MS        F

Gender                                       .027

Practice                                      140.60

Gender x Practice                          .073

Error                                          28.00

Total                                          168.70

a. Complete the ANOVA summary table.

b. Are the values of  Fobt significant at a=.05

c. What conclusion can be drawn from the F-rations

d. What is the effect size and what does this mean

(just the even ones)

(Note that I typed it out but I also print screened just in case I missed something)

2.     Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?

3.     What is blocking and how does it reduce “noise”? What is a disadvantage of blocking?

4.     What is a factor? How can the use of factors benefit a design?

5.     Explain main effects and interaction effects.

6.     How does a covariate reduce noise?

7.     Describe and explain three trade-offs present in experiments.

Support your paper with a minimum of 5 resources. In addition to these specified resources, other appropriate scholarly resources, including older articles, may be included.

Length: 5-7 pages not including title and reference pages
References: Minimum of 5 scholarly resources.

 Subject General Due By (Pacific Time) 10/22/2014 12:00 am
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