PSYC1234 EXERCISE 4

What is the science of statistics?

• The study of data collection, analysis, interpretation, and presentation.

• The study of mathematical models to describe phenomena that occur in the real world.

• The study of probability and probability distributions.

• The study of formal methods for drawing conclusions from good data.

What is the difference between a population and a sample?

• A population is a subset of a sample.

• A sample is a subset of a population.

• A population is a collection of individuals, objects, or measurements.

• A sample is a collection of individuals, objects, or measurements.

What is descriptive statistics?

• a subset of the population

• the proportion of the population

• describes the main features of the information

• concludes from the observation and analysis of data.

Which of the following symbols represents a population parameter?

• σ

• r

• 0

• SD

What is a variable in the context of scientific research?

• A constant value that never changes.

• A factor that can be manipulated or measured in an experiment.

• A subjective opinion.

• The outcome of an experiment.

In a positive correlation between two variables

• Both variables increase or decrease together

• One variable increases while the other decreases

• There is no relationship between the variables

• The variables fluctuate randomly

In an experiment examining the effect of sunlight on plant growth, if the amount of sunlight is manipulated, what is the independent variable?

• Plant growth

• Time of day

• Amount of sunlight

• Soil quality

What is a dependent variable in an experiment?

• The variable that is intentionally changed by the researcher.

• The variable that is measured or observed and is affected during the experiment.

• A constant value that remains unchanged.

• The variable that remains unaffected by the experimental conditions.

In a study investigating the impact of exercise on heart rate, if the heart rate is the variable being measured, what is the independent variable?

• Time of day

• Type of exercise

• Heart rate

• Resting heart rate

What is an active variable in a research study?

• A variable with consistent intervals.

• A variable that precedes the variable of interest.

• A variable intentionally manipulated by the researcher.

• A variable with a true zero point.