Los Angeles Pierce College Introductory Statistic One Way Independent ANOVA Worksheet

Question Description

One Factor Between Subjects Analysis of Variance

The data are stored in the files Lab #4 – Problem 1 data.sav and Lab #4 – Problem 2 data.sav. The data file could be downloaded from Canvas and save it on the Desktop.

Formulating the statistical hypotheses (null H0 and alternative H1)

The null hypothesis H0 reflects the all is same view of the world. In other words, the means of all three conditions are predicted to be equal to one another.

The alternative hypothesis H1 reflects the means of all three conditions are predicted to not be equal to one another.

Setting the Decision Stage

Choosing a statistical test

Individual observations between the groups are not related. Therefore, we can model the data as independent. However, because we have to compare three groups as opposed to only two, we cannot use the t-test. We have to use the One Factor Between Subjects ANOVA. (One factor because we have only one independent variable that serves to group the data. Between because the observations in different groups are independent.).

Selecting a significance level (alpha)

Usually, we select alpha = .05. But we could be more conservative and use alpha = .01. For this lab, we are going to use alpha = .05.

Formulating the decision rules

The decision rule is:

We reject H0 if the p-value associated with the observed statistic is less than or equal to alpha.

We fail to reject H0 if the p-value associated with the observed statistic is greater than alpha.

Calculating the observed statistic

Go to the data window.
Click on Analyze, select Compare Means, and click on One Way ANOVA.
Select the appropriate variable and move it into the Dependent List field.
Select the appropriate variable and move it into the Factor field.
Click on the POST HOC
Select Tukey option, then click CONTINUE.

Making a decision

The rejection of H0 means that on average the groups differ from each other in their dependent variable. But how do they differ? This question is answered by the post hoc test, Tukeys honestly significant difference.

The second part involves interpreting the results from the post hoc test.

Our Service Charter

1. Professional & Expert Writers: DESTINY PAPERS only hires the best. Our writers are specially selected and recruited, after which they undergo further training to perfect their skills for specialization purposes. Moreover, our writers are holders of master's and Ph.D. degrees. They have impressive academic records, besides being native English speakers.

2. Top Quality Papers: Our customers are always guaranteed papers that exceed their expectations. All our writers have +5 years of experience. This implies that all papers are written by individuals who are experts in their fields. In addition, the quality team reviews all the papers before sending them to the customers.

3. Plagiarism-Free Papers: All papers provided by DESTINY PAPERS are written from scratch. Appropriate referencing and citation of key information are followed. Plagiarism checkers are used by the Quality assurance team and our editors just to double-check that there are no instances of plagiarism.

4. Timely Delivery: Time wasted is equivalent to a failed dedication and commitment. DESTINY PAPERS is known for the timely delivery of any pending customer orders. Customers are well informed of the progress of their papers to ensure they keep track of what the writer is providing before the final draft is sent for grading.

5. Affordable Prices: Our prices are fairly structured to fit in all groups. Any customer willing to place their assignments with us can do so at very affordable prices. In addition, our customers enjoy regular discounts and bonuses.

6. 24/7 Customer Support: At DESTINY PAPERS, we have put in place a team of experts who answer all customer inquiries promptly. The best part is the ever-availability of the team. Customers can make inquiries anytime.