Reference no: EM131075082

The questions and answers are within the document labeled cf_daa_template.docx

Data File Description

1. Describe the context of the data set. You may cite your previous description if the same data set is used from a previous assignment.

2. Specify the variables used in this DAA and the scale of measurement of each variable.

3. Specify sample size (N).

Testing Assumptions

1. Articulate the assumptions of the statistical test.

2. Paste SPSS output that tests those assumptions and interpret them. Properly embed SPSS output where appropriate. Do not string all output together at the beginning of the section.

3. Summarize whether or not the assumptions are met. If assumptions are not met, discuss how to ameliorate violations of the assumptions.

Research Question, Hypotheses, and Alpha Level

1. Articulate a research question relevant to the statistical test.

2. Articulate the null hypothesis and alternative hypothesis.

3. Specify the alpha level.

Interpretation

1. Paste SPSS output for an inferential statistic and report it. Properly embed SPSS output where appropriate. Do not string all output together at the beginning of the section.

2. Interpret statistical results against the null hypothesis.

The information given for this assignment was as follows: t Tests You will complete this assignment using the DAA Template.

Read the SPSS Data Analysis Report Guidelines for a more complete understanding of the DAA Template and how to format and organize your assignment.

Refer to Step-By-Step Guide: t Tests for additional information on using SPSS for this assignment. If necessary, review the Copy/Export Output Instructions to refresh your memory on how to perform these tasks.

As with your previous two assignments, your submission should be narrative with supporting statistical output (table and graphs) integrated into the narrative in the appropriate place (not all at the end of the document).

You will analyze the following variables in the grades.sav data set: gender, gpa.

Step 1: Write Section 1 of the DAA Provide a context of the grades.sav data set.

Include a definition of the specified variables (predictor, outcome) and corresponding scales of measurement. Specify the sample size of the data set.

Step 2: Write Section 2 of the DAA Analyze the assumptions of the t test. Paste the SPSS histogram output for gpa and discuss your visual interpretations.

Paste SPSS descriptives output showing skewness and kurtosis values for gpa and interpret them. Paste SPSS output for the Shapiro-Wilk test of gpa and interpret it. Report the results of the Levene test and interpret it.

Summarize whether or not the assumptions of the t test are met.

Step 3: Write Section 3 of the DAA Specify a research question related to gender and gpa.

Articulate the null hypothesis and alternative hypothesis. Specify the alpha level.

Step 4: Write Section 4 of the DAA Paste the SPSS output of the t test.

Report the results of the SPSS output using proper APA guidelines (refer to the Unit 8 Introduction and the "Results" example of the Warner text in Chapter 5).

Include: t. Degrees of freedom. t value. p value. Effect size. Interpretation of effect size. Means and standard deviations for each group. Mean difference. 95% confidence interval of the difference of sample means.

Interpret the results against the null hypothesis.

Step 5: Write Section 5 of the DAA Discuss the implications of this t test as it relates to the research question. Conclude with an analysis of the strengths and limitations of t test analysis.

Attachment:- oth.zip