Recommended
More Related Content
What's hot
What's hot (20)
Similar to Foundations of Data Analytics
Similar to Foundations of Data Analytics (20)
Recently uploaded
Recently uploaded (20)
Foundations of Data Analytics
- 1. Data Analysis Fundamentals/Eduphoria Tutorial Dr. Michael G. Richards Director, Data & Accountability District Testing Coordinator
- 2. What is a Relational Database? • The invention of this database system has standardized the way that data is stored and processed. • A relational database consists of a collection of tables that store particular sets of data. • The concept of a relational database derives from the principles of relational algebra, developed by E. F. Codd in the 1970s. • Relational databases are built-in to software like EDUPHORIA, so the database is generally invisible to the user.
- 3. What Does One Do With a Relational Database? 1. 2. Upload data Query
- 4. Querying 1. 2. Write code (SQL, R, SAS) Employ a Graphic User Interface (GUI)
- 5. Smart Querying • Know your research question well before pushing any buttons! • Think in terms of ROWS & COLUMNS column row
- 6. Just for fun… SQL term Relational database term Description Row Tuple or record A data set representing a single item Attribute or field A labeled element of a tuple, e.g. "Address" or "Date of birth" Relation or Base relvar A set of tuples sharing the same attributes; a set of columns and rows Derived relvar Any set of tuples; a data report from the RDBMS in response to a query Column Table View or result set Eduphoria borrows its terminology from SQL
- 7. Shopping Analogy Choosing your mall is equivalent to choosing ROWS Filling your shopping cart is equivalent to choosing COLUMNS
- 8. ROW/COLUMN Quiz Q1. There is a teacher of 32 8th-grade math students and the teacher has just given a DA and wants to debrief with her students. She needs a quick read on how they did on each item. A1. ROWS: students; COLUMNS: test items Bonus: What will appear in the table cells? answer choice and disposition
- 9. Let’s Complicate Things (Slightly) • The BY function • It is hidden by the GUI in Eduphoria • Often used to create additional levels in either ROWS or COLUMNS • Ex: Scores: SE% correct BY ethnicity (extra level of COLUMNS) • Student scores BY teacher (could be extra level of ROWS)
- 10. ROW/COLUMN Quiz Q2. I want to know if the fifth graders did better this year on STAAR math than they did last year. A2. ROWS: students; COLUMNS: scores by test
- 11. Choosing ROWS through the Wizard • Not as apparent as choosing COLUMNS • You begin choosing ROWS as soon as you begin querying the database by narrowing down the data (driving to the mall) • “Select a Test” • “How do you want to view the results?” • “Select a timeframe” Note: almost always choose “Where students are now”
- 12. Choosing COLUMNS Through the Wizard Next
- 14. Let’s Run the 2 Quiz Questions in Eduphoria 1. 2. 3. 4. 5. 6. 7. Using (on not using) the Wizard Color coding/heat mapping Data pivot Summary view options Graphing Editing Exporting
- 15. The 2 Questions • Q1. There is a teacher of 32 8th-grade math students and the teacher has just given a DA and wants to debrief with her students. She needs a quick read on how they did on each item. • Q2. I want to know if all 5th-graders did better this year on STAAR math than they did last year.
- 16. Exporting Data from Eduphoria • For distribution analysis • For inferential analysis
- 18. Inferential Stats: Significance Signal Noise Significant difference or relationship? α = 0.05
- 19. Difference in the 5th Grade Math Performance?
- 20. We are only 74% sure
- 21. FERPA • Do not send emails with text or datasets (attached or otherwise) that contain information identifying students • All data analysis that leaves the campus or the district offices must be vetted through C&I
- 22. Q&A