variables

Variables

The keys to studying relationships.

Variables

A relationship is a statement about variables.

Variables

A relationship is a statement about variables.A variable is a concept and refers to the variation found within a class of objects.

Variables

A variable is a concept and refers to the variation found within a class of objects.

Height

Variables


Heightweight

Variables


Heightweightage

Variables


Heightweightageeducation level

Variables


Heightweightageeducation levelhair color

Variables


Heightweightageeducation levelhair colorthe type of automobile one drives

Variables


weightageeducation levelhair colorthe type of automobile one drivesnumber of hours of sleep one requires

Constants

Constants are characteristics that do not vary.

Constants


gender, when members of only one sex are studied

Constants


gender, when members of only one sex are studiedpeople attending one school as opposed to subjects from different schools

Constants


gender, when members of only one sex are studiedpeople attending one school as opposed to subjects from different schoolsonly left-handed people

Constants


gender, when members of only one sex are studiedpeople attending one school as opposed to subjects from different schoolsonly left-handed peopleonly people of Japanese ancestry

Different types of variables

Quantitative variables - Something that you can "stick a number on"

Different types of variables

Quantitative variables - Something that you can "stick a number on"Categorical variables - How dexterous or intimidating someone may be.

Quantitative or categorical variable?

1. Make of automobile


1. Make of automobile - categorical


1. Make of automobile2. Learning ability


1. Make of automobile2. Learning ability - categorical


1. Make of automobile2. Learning ability3. Ethnicity


1. Make of automobile2. Learning ability3. Ethnicity - categorical


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence - categorical


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence5. Heartbeat rate


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence5. Heartbeat rate - quantitative


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence5. Heartbeat rate6. Gender


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence5. Heartbeat rate6. Gender - categorical


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence5. Heartbeat rate6. Gender7. Brand of Shoe


1. Make of automobile2. Learning ability3. Ethnicity4. Intelligence5. Heartbeat rate6. Gender7. Brand of Shoe - categorical

Studying Relationships

In science, researchers look at the relationships between two or more quantitative variables.


In science, researchers look at the relationships between two or more quantitative variables.Age vs height


In science, researchers look at the relationships between two or more quantitative variables.Age vs heightSAT Reading Scores vs SAT Math Scores


In science, researchers look at the relationships between two or more quantitative variables.Age vs heightSAT Reading Scores vs SAT Math ScoresAmount of time watching television vs Number of fights

Independent and dependent variables

Independent variables are those that the researcher chooses to study in order to examine their effect on one or more other variables.

Independent and dependent variables

Independent variables are those that the researcher chooses to study in order to examine their effect on one or more other variables.Dependent variables are the variables that the independent variables are presumed to affect.

Can you identify the variables?

Will students of teachers who graduated with a subject area major in addition to elementary education have higher test scores than students of education majors?Independent variable:Dependent variable:


Will students of teachers who graduated with a subject area major in addition to elementary education have higher test scores than students of education majors?Independent variable: what teachers majored inDependent variable:


Will students of teachers who graduated with a subject area major in addition to elementary education have higher test scores than students of education majors?Independent variable: what teachers majored inDependent variable: test scores

Independent Variables

Independent variables may one of two things:manipulatedselected

Manipulated Independent Variables

A manipulated variable is one that the researcher creates.

Manipulated Independent Variables

A manipulated variable is one that the researcher creates. Manipulated variables are also known as treatment variables or experimental variables.

Selected Independent Variable

Selected independent variables are primarily used in experiments involving humans.

Selected Independent Variable

Selected independent variables are primarily used in experiments involving humans. Example: To study if a new AIDS vaccine works, it would be wrong to give the vaccine and then inject someone with AIDS. Instead, people are selected to get the vaccine who are likely to contract AIDS on their own.

variables

Health & Medicine

variablesa variable

class of objects

variablesa relationship

height weight age