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5. In the simple linear regression equation, the symbol x represents the .
a. Estimated or predicted response b. Estimated intercept
c. Estimated slope d. Independent variable

6. Which of the following is true about residual error?

a. Lower value is better b. Higher value is better
c. Either a. or b. d. All of these

7. What is the main purpose of data modelling?
a. To plan how data is stored and used b. To design blueprints of buildings
c. To write computer programs d. To track sales

8. In which data model is data stored in tables with rows and columns?
a. Object-oriented model b. Hierarchical model
c. Relational model d. Star model

9. Which language is commonly used in relational databases?
a. HTML b. SQL

c. XML d. CSS

10. The Dimensional Model divides data into .
a. Charts and Graphs b. Folders and Files
c. Facts and Dimensions d. Codes and Scripts

B. Fill in the blanks.

1. The regression line is also called the line of .
2. Data modelling is like making a or a blueprint for how data will be stored

3. In the data model, data is stored in a tree-like structure.
4. Tables in a relational data model are connected using a common .

5. SQL stands for .
6. Dimensional data models are mostly used in and business reports.

7. Linear regression helps to values based on existing data.
8. In regression, the variable being predicted is called the variable.
9. The slope in a regression line shows the between two variables.

10. Data modelling helps to reduce in software development.

C. State whether these statements are true or false.
1. Data modelling is only useful in game development.

2. The relational model uses tables to store and connect data.
3. Hierarchical models allow a child to have more than one parent.

4. Dimensional models are not suitable for reporting purposes.
5. Linear regression is used for predicting future values.
6. Regression is used to predict the value of the variable that is dependent on the second variable.

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