TOPIC 3 (SET B)

Weather is a confounding variable in this research study.

"Research is carried out to determine the extent of correlation between money and the sale of ice-cream"

• True

• False

• Either True or False

• Neither True nor False

An apartment complex is interested in knowing whether having children influences how long people will rent an apartment from them.

Based on the given research study, identify which of the following variable is considered as confounding variable?

• Fatigue levels

• If the job moves

• Age

• Amount of hobbies

The relationship between background music and task performance amongst employees at a packing facility

• Independent: task performance

• Dependent: background music

• Extraneous: time of day when the background music was played

• Confounding: employee tiredness

You want to see which type of fertilizer helps plants grow fastest, so you add a different brand of fertilizer to each plant and see how tall they grow.

• Independent: Plant height

• Confounding: Type of fertilizer given to the plant

• Dependent: Plant height

• Extraneous: Type of fertilizer given to the plant

You want to figure out which brand of microwave popcorn pops the most kernels so you can get the most value for your money. You test different brands of popcorn to see which bag pops the most popcorn kernels.

• Independent: Brand of microwave popcorn

• Dependent: Brand of popcorn bag

• Independent: Number of kernel popped

• Extraneous: Number of kernel popped

Statement A: Ordinal variable serve the purpose of classification and ranking

Statement B: Nominal variable serve the purpose of identification

• Statement A is true, Statement B is false

• Statement A is false, Statement B is true

• Both statements are correct

• Both statements are incorrect

Variables which cannot be manipulated by the researcher

• Numeric

• Categorical

• Experimental

• Non-experimental

Statement A: Interval variables recognize the value between whole numbers

Statement B: Discrete variables recognize whole numbers

• Statement A is true, Statement B is false

• Statement A is false, Statement B is true

• Both statements are correct

• Both statements are incorrect

Statement A: A discrete variable is a variable whose value is obtained by counting.

Statement B: A continuous variable is a variable whose value is obtained by measuring.

• Statement A is true, Statement B is false

• Statement A is false, Statement B is true

• Both statements are correct

• Both statements are incorrect

Which of the following is an example of nominal variable

• Species name

• Finishing place in a race

• Level of Satisfaction

• Rating scale responses in a survey