Understanding Variables in Research

What is the primary role of a variable in research?

• To be dependent

• To remain constant

• To vary or change

• To be independent

In the context of research, what does an independent variable do?

• It is always numerical

• It remains unchanged

• It affects the dependent variable

• It is affected by the dependent variable

Which of the following is an example of a dependent variable?

• Study time

• Examination scores

• Vegetable consumption

• Gender

How does vegetable consumption affect energy levels according to the video?

• It only affects energy levels in children

• It increases energy levels

• It has no effect on energy levels

• It decreases energy levels

What type of variable is 'gender' considered as?

• Ratio

• Nominal

• Interval

• Ordinal

Which type of variable is associated with order or ranking?

• Nominal

• Ordinal

• Interval

• Ratio

What is an example of an interval variable?

• Gender

• Examination scores

• Weight

• Height

Which of the following is a ratio variable?

• Hair color

• Duration

• Favorite writer

• Position in a company

What distinguishes numerical variables from categorical variables?

• Categorical variables are always qualitative

• Numerical variables are always whole numbers

• Numerical variables pertain to numbers, amounts, or values

• Categorical variables are always quantitative

Which of the following is NOT a type of categorical variable?

• Ordinal

• Nominal

• Ratio

• Interval