Identifying variable

Identify the explanatory variable:

A survey is investigating whether preferred film type can be explained by the gender of the person asked to give their preference.

• Preferred film type

• Gender

Identify the response variable:

A survey investigating whether the activity a parent would most like a daughter to excel at can be explained by the gender of the parent.

• Gender of parent

• Preferred activity of daughter

Identify the explanatory variable:

A survey investigated whether there was any evidence that the likelihood of a person developing respiratory problems in the teenage years could be associated with the age of the person’s mother at the time the person was born.

• Age of mother when person was born

• likelihood of person developing respiratory problems

Identify the response variable:

A survey investigating whether the left or right handedness of a child was associated with the left or right handedness of the child’s mother.

• Left or right handedness of child

• Left or right handedness of mother

Identify the response variable:

A survey investigating whether a person’s preferred football code, out of AFL, Rugby League, Rugby Union and Soccer could be explained by the state a person lives in.

• State a person lives in

• Preferred football code

Identify the explanatory variable:

Investigating how the grade a student gets in an exam may relate to the amount of study a student does for that exam.

• Amount of study

• Grade in exam

Identify the explanatory variable:

Investigating how the number of babies born in a country per year might relate to the population of the country.

• Population of country

• Number of babies born in country per year

Identify the explanatory variable:

Investigating into how well a person sleeps at night and a rating of the person’s grumpiness the next morning.

• How well a person sleeps at night

• The person's grumpiness the next morning

Identify the response variable:

Whether or not a person has a particular mental disorder and whether they claim to ‘hear voices’.

• Having, or not having, the mental disorder

• Hearing voices

Identify the response variable:

An investigation into how frequently a person brushes their teeth (after most meals, once a day, 4 to 6 times a week, 1 to 3 times a week, less than once a week) and gender.

• Gender

• Frequency of brushing teeth