Review the "Sample Size" Topic Material. Assume you want to do a project that compares the survey results before an intervention to those after an intervention in the same sample (the same people will take both surveys). You plan to use a paired t-test to analyze your results. Identify and select a tool of your choice to conduct the sample size calculation. You may use your Statistical Package for the Social Sciences (SPSS), but it is not required for this assignment. You may also use other resources such as Laerd Statistics and Intellectus. Perform a sample size calculation to determine how large your sample should be. Justify your sample size calculation with citations. Discuss how your sample size may affect the validity of your project.