Front

What is the Interquartile Range (IQR)?

Back

The IQR is a measure of statistical dispersion, representing the range between the first quartile (Q1) and the third quartile (Q3) in a data set. It is calculated as IQR = Q3 - Q1.

Front

What does a positive linear correlation indicate?

Back

A positive linear correlation indicates that as one variable increases, the other variable also tends to increase, and this relationship can be represented by a straight line on a graph.

Front

What does the shaded region in a probability graph represent?

Back

The shaded region represents the probability of a certain event occurring, often indicating the area under the curve for that event.

Front

What value of 'r' indicates a strong positive correlation?

Back

A strong positive correlation is indicated by an 'r' value close to 1, typically around 0.93.

Front

What conclusion can be drawn from a scatterplot showing no relationship?

Back

If a scatterplot shows no relationship, it indicates that changes in one variable do not affect the other variable.

Front

How do you calculate the mean of a data set?

Back

The mean is calculated by summing all the values in the data set and dividing by the number of values.

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation of two variables, showing the relationship between them using points on a Cartesian plane.

Front

What does a negative correlation indicate?

Back

A negative correlation indicates that as one variable increases, the other variable tends to decrease.

Front

What is the purpose of a box plot?

Back

A box plot visually summarizes the distribution of a data set, highlighting the median, quartiles, and potential outliers.

Front

What is the difference between population and sample in statistics?

Back

A population includes all members of a specified group, while a sample is a subset of the population used for analysis.