HLT 540 Grand Canyon Week 7 Discussion 1

What are the indicators for using an ANOVA? Create a research scenario in which it would be correct to use an ANOVA, including the research question, sample size, and dependent and independent variables.

ADDITIONAL INFO 

What are the indicators for using an ANOVA

Introduction

The idea behind an ANOVA is simple: you want to determine if the means of the groups are different from one another. Let’s say you have a group of people and measure their height, weight, and BMI in each group to see how they differ from one another. You might find that the people in Group 1 weigh less than average while those in Group 2 weigh more than average and those in Group 3 weigh somewhere in between.

ANOVA is used when you have a categorical dependent variable and a continuous independent variable.

ANOVA is used when you have a categorical dependent variable and a continuous independent variable. The independent variable is the thing that changes from group to group, while the dependent variable represents your outcome measure.

For example:

• You have three groups of participants and each group has received different treatments (e.g., one group received no treatment, another received some treatment, and another received all possible treatments).

• The dependent variable here would be whether or not each participant in each group survived past a certain period of time after receiving their respective treatments.*

ANOVA is also used when you have several groups with a categorical independent variable

ANOVA is also used when you have several groups with a categorical independent variable. In this case, the researcher will use a statistical technique called “analysis of variance” or ANOVA to determine whether there are any differences between the groups in their means.

The researcher begins with an idea about what she wants to find out: Are there differences between the groups? If so, how many? How large are those differences? She then sets up an experiment (or other research method) that allows her to answer these questions by comparing scores from each group against one another.

This process involves three steps:

• Define variables and prepare data collection sheet(s).2) Calculate appropriate statistical tests using computer software such as Statistica™ or SPSS™ Basic Edition Statistics Software Package for Windows 2000/XP/Vista/7/8 Operating Systems

In both cases above, you’re looking at how a dependent variable changes depending on which group it’s in.

In both cases above, you’re looking at how a dependent variable changes depending on which group it’s in.

In the first example, you have two groups: “male” and “female.” If we were to use an ANOVA more generally with this data set, we could look at whether there was any difference between males and females based on their age. The mean age of males is 31 years old—so if we want to see if there are differences between these two groups when it comes to age, we would run an ANOVA and look for a significant effect (i.e., meaning that there was some kind of difference). We would also need to account for whether there were any interactions with other factors such as education level or income level—and so forth.

You want to determine if the means of the groups are different from one another

You want to determine if the means of the groups are different from one another. If they are not, then you can use ANOVA to determine if there is a significant difference between the means of your groups.

The ANOVA test is used as part of an experiment where a researcher has two or more groups with each group having its own experimental condition (e.g., A compared with B). The researcher compares mean scores on certain variables for each group before and after treatment in order for him/her to draw conclusions about changes in behaviour due to treatment.

Conclusion

Now that you’ve got the basics of ANOVA out of the way, I hope you’ll feel confident when using it in your research projects. As always, if you have any questions or concerns about this content please let me know!

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