Research Methods, Shapes, Center & Spread

Front

What is the Interquartile Range (IQR)?

Back

The IQR is a measure of variability that represents the range between the first quartile (Q1) and the third quartile (Q3) in a data set, indicating the middle 50% of the data.

Front

What does it mean if a distribution is skewed right?

Back

A right-skewed distribution has a longer tail on the right side, indicating that most data points are concentrated on the left, with a few larger values stretching the tail to the right.

Front

What is a symmetrical distribution?

Back

A symmetrical distribution is one where the left and right sides of the distribution are mirror images of each other, meaning the mean, median, and mode are all equal.

Front

When is the mean the most appropriate measure of center?

Back

The mean is the most appropriate measure of center when the distribution is symmetrical and does not have outliers.

Front

What type of research design involves manipulating variables to determine cause and effect?

Back

An experiment is a research design that involves manipulating one or more independent variables to observe the effect on a dependent variable.

Front

What is the purpose of using the median as a measure of center?

Back

The median is used as a measure of center when the data set is skewed or contains outliers, as it is less affected by extreme values.

Front

What does it mean if a distribution is skewed left?

Back

A left-skewed distribution has a longer tail on the left side, indicating that most data points are concentrated on the right, with a few smaller values stretching the tail to the left.

Front

What is the difference between descriptive and inferential statistics?

Back

Descriptive statistics summarize and describe the characteristics of a data set, while inferential statistics use sample data to make generalizations or predictions about a population.

Front

What is the role of random assignment in experiments?

Back

Random assignment helps ensure that each participant has an equal chance of being placed in any group, which minimizes bias and allows for causal inferences.

Front

What is a case study in research methods?

Back

A case study is an in-depth analysis of a single individual, group, or event, often used to explore complex issues in real-life contexts.