THE VARIABLE

What is the meaning of the Latin word variare which the word variable originated?

• monetary coins

• to change

• to charge

• rare

Which type of variable causes a change in another variable?

(2 correct answers)

• independent

• dependent

• response

• stimulus

In the given problem, "What effect does studying with music have on student test scores?", which of the following pairing of variables is correct?

• student test scores-predictor variable

• studying with music-manipulated variable

• studying with music-measured variable

• student test scores-independent variable

Which of the following research problems best identifies the

a. independent variable-eating breakfast and

b. dependent variable- learning ability

• The learning ability of the students affects their eating of breakfast.

• Eating breakfast and the learning ability affect the students.

• Eating breakfast depends on the learning ability of the students.

• Eating breakfast affects the learning ability of the students.

A researcher wants to conduct a study comparing the different brands of paper towels, to see which holds the most liquid. He buys 5 different brands of paper towels, takes a single piece, and puts them in individual containers with water. After a few minutes, the researcher takes out the tissue paper, places each piece on individual plates, squeezes out the absorbed water, measures the amount of water that came out of each tissue paper, and records his findings.

What is the independent variable?

• different amounts of water

• different brands of paper towels

• different types of water

• different container plates

If a Grade 7 student likes to conduct an experiment that involves the temperature of the surroundings and the rate of germination of tomato, which variable must be manipulated by the student?

• temperature

• tomato

• rate of germination

• himself/herself

Given the independent variable-drinking coffee and the dependent variable-number of hours of sleep, which of the following questions best describes the variables in a problem?

• What effect does the number of hours have on sleep?

• What is the effect of drinking coffee on the number of hours of sleep?

• What is the effect of the number of hours of sleep on the quality of the coffee?

• How does sleeping affect the drinking of coffee?