Scatter Plots and Trend Lines

Front

What is a scatter plot?

Back

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

Front

What does a trend line represent in a scatter plot?

Back

A trend line is a straight line that best represents the data points in a scatter plot, indicating the general direction of the data.

Front

What is positive correlation?

Back

Positive correlation occurs when an increase in one variable leads to an increase in another variable, resulting in a trend that slopes upwards.

Front

What is negative correlation?

Back

Negative correlation occurs when an increase in one variable leads to a decrease in another variable, resulting in a trend that slopes downwards.

Front

What does it mean if there is no correlation?

Back

No correlation means that there is no discernible relationship between the two variables; changes in one do not affect the other.

Front

How can you identify a strong correlation in a scatter plot?

Back

A strong correlation is identified when the data points are closely clustered around the trend line, indicating a clear relationship.

Front

What is a weak correlation?

Back

A weak correlation is when the data points are more spread out from the trend line, indicating a less clear relationship between the variables.

Front

What is the purpose of using trend lines in data analysis?

Back

Trend lines help to summarize the overall direction of the data, making it easier to identify patterns and make predictions.

Front

How do you determine the type of correlation from a scatter plot?

Back

To determine the type of correlation, observe the direction of the trend line: upward for positive, downward for negative, and scattered for none.

Front

What is an example of positive correlation in real life?

Back

An example of positive correlation is the relationship between hours studied and test scores; generally, more study time leads to higher scores.