# T-test

T-test

The data represent a teacher’s recording of student demographics and performance on quizzes and a final exam across three sections of the course. Each section consists of 35 students (N = 105). There are 21 variables in grades. sav.

This week’s assignment is on t-tests. You will analyze the following variables in the grades.sav data set:

SPSS Variable SPSS Variable
Review Attended review sessions?: 1 = no; 2 = yes
Final exam: Number of correct answers
Step 1: Write Section 1 of the DAA: The Data Analysis Plan
Name the variables used in this analysis and whether they are categorical or continuous.
State a research question, null hypothesis, and alternate hypothesis for the independent samples t-test.
Step 2: Write Section 2 of the DAA: Testing Assumptions
Test for one of the assumptions of t-tests – homogeneity of variance.

## How do you solve a t-test step by step?

T-test

Create SPSS output showing the Levene’s Test for Equality Variances. Run the Levene’s test on the dependent variable test for the entire sample. Do not split the data up by review session before running the homogeneity test.
Paste the table in the DAA.
Interpret Levene’s test.
Step 3: Write Section 3 of the DAA: Results and Interpretation
Paste the SPSS output of the t-test. Below is the output:

### Analyze how you might use the independent samples t-test in your field of study

T-test

Report the means and standard deviations for each group.
State the results of the t-test using the “Assume equal variances” row.
Interpret the statistical results against the null hypothesis and state whether it is accepted or rejected.
Step 4: Write Section 4 of the DAA: Statistical Conclusions