Unit 4 Test Review

Front

What is a correlation in statistics?

Back

A correlation is a statistical measure that describes the extent to which two variables change together. It can be positive, negative, or no association.

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 does a positive correlation indicate?

Back

A positive correlation indicates that as one variable increases, the other variable also tends to increase.

Front

What is a scatter plot?

Back

A scatter plot is a graph that shows the relationship between two quantitative variables by displaying data points on a two-dimensional axis.

Front

What does it mean if a scatter plot shows no relationship?

Back

If a scatter plot shows no relationship, the points are scattered randomly and do not show any clear trend or pattern.

Front

What is the slope of a line?

Back

The slope of a line is a measure of its steepness, calculated as the change in the y-value divided by the change in the x-value.

Front

What does a zero slope indicate?

Back

A zero slope indicates that there is no change in the y-value as the x-value changes, resulting in a horizontal line.

Front

What is a flat fee in a pricing model?

Back

A flat fee is a fixed charge that does not change regardless of the amount of service provided.

Front

How do you find the point where two linear equations intersect?

Back

To find the intersection point, set the equations equal to each other and solve for the variable.

Front

What is the formula for calculating total cost with a flat fee and hourly rate?

Back

Total Cost = Flat Fee + (Hourly Rate × Number of Hours)