Front

What is the subject in a study about how drinking milk affects Dora's height?

Back

Dora.

Front

What sampling method uses a random number dialer to select survey participants?

Back

SRS (Simple Random Sampling)

Front

What does variability mean in statistics?

Back

Variability means that the value of the variable being studied can change from one person or thing to another.

Front

What is the purpose of using a placebo in a study about pre-workout supplements?

Back

To account for the placebo effect, where participants may change their response because they think they received the real treatment.

Front

What could be a confounding variable in a study linking daily Aspirin use to heart attack risk?

Back

How much stress someone experiences daily.

Front

Define 'confounding variable' in the context of research studies.

Back

A confounding variable is an outside influence that changes the effect of a dependent and independent variable.

Front

What is the difference between a sample and a population in statistics?

Back

A sample is a subset of a population used to represent the entire group.

Front

What is the purpose of random sampling in research?

Back

To ensure that every individual has an equal chance of being selected, reducing bias.

Front

Explain the term 'bias' in the context of statistical studies.

Back

Bias refers to systematic errors that lead to incorrect conclusions in research.

Front

What is a variable in statistics?

Back

A variable is any characteristic, number, or quantity that can be measured or counted.