CFA Review

Front

What is a function?

Back

A function is a relation where each input (x-value) has exactly one output (y-value).

Front

How can you determine if a relation is a function?

Back

Use the vertical line test: if a vertical line intersects the graph at more than one point, it is not a function.

Front

What does a positive linear relationship in a scatterplot indicate?

Back

As one variable increases, the other variable also increases, forming a straight line.

Front

What does a negative linear relationship in a scatterplot indicate?

Back

As one variable increases, the other variable decreases, forming a straight line.

Front

What is a non-linear relationship in a scatterplot?

Back

A relationship where the data points do not form a straight line, indicating a varying rate of change.

Front

What is the mean absolute deviation (MAD)?

Back

MAD is the average of the absolute differences between each data point and the mean of the data set.

Front

How do you calculate the mean of a set of numbers?

Back

Add all the numbers together and divide by the count of numbers.

Front

What is the formula for calculating mean absolute deviation?

Back

Front

What does it mean if a scatterplot shows 'neither' positive nor negative correlation?

Back

It means there is no discernible pattern or relationship between the two variables.

Front

What is the significance of the scatterplot in data analysis?

Back

Scatterplots visually represent the relationship between two quantitative variables, helping to identify trends.