Assessment 1 - Your first statistical software assessment includes two sections in which you will do the following:

1. Create two histograms.
2. Calculate measures of central tendency and dispersion.

This will give you some experience with the data set.

Key Details and Instructions

• Submit your assessment as a Word document.
• Refer to the JASP Step-by-Step: Histograms and Descriptive Statistics [PDF] document for additional help in completing this assessment.
• View JASP Speedrun: Descriptive Statistics [Video] for a brief tutorial on this assessment.
• As you work on this assessment, refer to the 7864 Data Set Instructions [PDF] file for information on variables used in this course.
• Provide a title for your document and your name.

Download the 7864 data set, grades.jasp, which is a sample data set, and save it to your computer. The data represent a teacher's recording of student demographics and performance on quizzes and a final exam. For this assessment, you will create and describe two histograms and a descriptives table using these data.

For this assessment, you will use the Data Analysis and Application template (DAA Template [DOCX]). Assessment 2

• For help with statistical software, refer to theJASP Step-by-Step: Correlations [PDF]document.
• ViewJASP Speedrun: Correlations [Video]for a brief tutorial video on this assessment.
• Refer to the7864 Course Study Guide [PDF]for information on analyses and interpretation.
• For information on the data set, refer to the7864 Data Set Instructions [PDF]document.

Thegrades.jaspfile is a sample data set. The data represent a teacher's recording of student demographics and performance on quizzes and a final exam across three sections of the course.

This assessment is on correlations. You will analyze the following variables in thegrades.jaspdata set:

Variables and Definitions

Variable	Definition
Quiz 1	Quiz 1: number of correct answers
GPA	Previous grade point average
Total	Total number of points earned in class
Final	Final exam: number of correct answers

TheDAA Template [DOCX]has five sections:

• Data Analysis Plan.
• Testing Assumptions.
• Results & Interpretation.
• Statistical Conclusions.
• Application.

Step 1: Write Section 1 of the DAA: Data Analysis Plan

• Name the four variables used in this analysis and whether they are categorical or continuous.
• State a research question, null hypothesis, and alternate hypothesis for the total-final correlation.
• State a research question, null hypothesis, and alternate hypothesis for the gpa-quiz1 correlation.

Step 2: Write Section 2 of the DAA: Testing Assumptions

Test for one of the assumptions of correlationnormality.

• Create a descriptive statistics table in the statistical software to assess normality. This table should include the four variables named above including skew and kurtosis for each variable.
• Paste the table in the DAA template.
• Interpret the skewness and kurtosis values and determine whether the assumption of normality was violated or not violated.

Step 3: Write Section 3 of the DAA: Results & Interpretation

• Using the statistical software, paste the intercorrelation matrix for the four variables into the document.
• Below the output, first report the total-final correlation including degrees of freedom, correlation coefficient, and p value. Specify whether or not to reject the null hypothesis for this correlation.
• Second, report the gpa-quiz1 correlation including degrees of freedom, correlation coefficient, and p value. Specify whether or not to reject the null hypothesis for this correlation.

Step 4: Write Section 4 of the DAA: Statistical Conclusions

• Provide a brief summary of your analysis and the conclusions drawn about correlations.
• Analyze the limitations of the statistical test and/or possible alternative explanations for your results.

Step 5: Write Section 5 of the DAA: Application

• Analyze how you might use correlations in your field of study.
• Name two variables that would work for such an analysis and why studying the relationship may be important to the field or practice.

Submit your completed DAA Template as an attached Word document in the assessment area.

In this assessment, you'll begin to explore mean group differences in your courseroom data. Is it possible that being in a particular group results in higher or lower mean achievement levels? You're going to explore possible differences in final exam scores for students who attended a review session versus students who did not attend a review session.

Instructions- Assessment 3

For this assessment:

• Use the Data Analysis and Application template (DAA Template [DOCX]).
• For help with the statistical software, refer to theJASP Step-by-Step: t Tests [PDF]document.
• ViewJASP Speedrun: t Test [Video]for a brief tutorial video on this assessment.
• For information on the data set, refer to the7864 Data Set Instructions [PDF]document.

Thegrades.jaspfile is a sample data set. The data represent a teacher's recording of student demographics and performance on quizzes and a final exam across three sections of the course.

You will analyze the following variables in thegrades.jaspdata set:

Variables and Definitions

Variable	Definition
Review	Attended review sessions? 1 = no; 2 = yes.
Final	Final exam: number of correct answers.

Step 1: Write Section 1 of the DAA: 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 samplest-test.

Step 2: Write Section 2 of the DAA: Testing Assumptions

Test for one of the assumptions of t tests - equality (homogeneity) of variances.

• Create statistical output showing the Levene's Test for Equality Variances. Paste the table in the DAA template. Interpret the Levene's test.

Step 3: Write Section 3 of the DAA: Results & Interpretation

• If the homogeneity assumption is not violated (Section 2), run the "Student" version of the independent samples t-test in the statistical software.
• If the homogeneity assumption is violated, run the "Welch" version of the independent samples t-test in the statistical software.
• Also run the "Descriptives" option to obtain the means and standard deviations for each group.

Paste the statistical software output of thettest into the DAA template. Below the output:

• Report the means and standard deviations for each group.
• State the results of thettest.
• Interpret the statistical results against the null hypothesis and state whether it is rejected or not rejected.

Step 4: Write Section 4 of the DAA: Statistical Conclusions

• Provide a brief summary of your analysis and the conclusions drawn about thisttest.
• Analyze the limitations of the statistical test and/or possible alternative explanations for your results.

Step 5: Write Section 5 of the DAA: Application

• Analyze how you might use the independent samplesttest in your field of study.
• Name an independent variable and dependent variable that would work for such an analysis and why studying it may be important to the field or practice.

Submit your DAA Template as an attached Word document in the assessment area.

For this assessment: Assessment 4

• Use the Data Analysis and Application template (DAA Template [DOCX]).
• For help with the statistical software, refer to theJASP Step-by-Step: ANOVA [PDF]document.
• ViewJASP Speedrun: ANOVA [Video]for a brief tutorial video on this assessment.
• Refer to the7864 Course Study Guide [PDF]for information on analyses and interpretation.
• For information on the data set, refer to the7864 Data Set Instructions [PDF]document.

Thegrades.jaspfile is a sample data set. The data represent a teacher's recording of student demographics and performance on quizzes and a final exam across three sections of the course.

This assessment is on ANOVA. You will analyze the following variables in thegrades.jaspdata set:

Variables and Definitions

Variable	Definition
Section	Class section
Quiz3	Quiz 3: number of correct answers

Step 1: Write Section 1 of the DAA: 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 ANOVA.

Step 2: Write Section 2 of the DAA: Testing Assumptions

Test for one of the assumptions of ANOVA - homogeneity.

• Create statistical software output showing the Levene's Test for Equality of Variances.
• Paste the table in the DAA template.
• Interpret the homogeneity test to determine whether the assumption of homogeneity is violated or is not violated.

Step 3: Write Section 3 of the DAA: Results & Interpretation

• If the homogeneity assumption is not violated (Section 2), run the "Homogeneity corrections: None" version of the ANOVA. Follow up with the "Standard" version of the Tukey post hoc test.
• However, if the homogeneity assumption is violated (Section 2), run the "Homogeneity corrections: Welch" version of the ANOVA. Follow up with the "Games-Howell" version of the Tukey post hoc test.

Paste the following statistical software tables into the document:

• Descriptives table.
• ANOVA table.
• Post Hoc Tests table (Tukey correction).

Below the output:

• Report the means and standard deviations of quiz3 for each group of the section variable.
• Report the results of the F test and interpret the statistical results against the null hypothesis; state whether the null hypothesis is rejected or not rejected.
• Finally, if the F is significant, interpret the post-hoc tests.

Step 4: Write Section 4 of the DAA: Statistical Conclusions

• Provide a brief summary of your analysis and the conclusions drawn about this ANOVA.
• Analyze the limitations of the statistical test and/or possible alternative explanations for your results.

Step 5: Write Section 5 of the DAA: Application

• Name an independent variable (the IV should have three or more groups or categories) and dependent variable that would work for such an analysis and why studying it may be important to the field or practice.

Submit your DAA Template as an attached Word document in the assessment area.

Please answer everything and complete it