8.5C,8.11A, 8.5D, 8.7A Test December 13

Front

What is a scatterplot?

Back

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

Front

What does a linear relationship in a scatterplot indicate?

Back

A linear relationship indicates that as one variable increases or decreases, the other variable tends to increase or decrease in a consistent manner, forming a straight line when graphed.

Front

How can you predict values using a scatterplot?

Back

You can predict values by finding the trend line or pattern in the scatterplot and using it to estimate the value of one variable based on the value of the other.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables, identify trends, and make predictions.

Front

What does it mean if a scatterplot shows no clear pattern?

Back

If a scatterplot shows no clear pattern, it suggests that there is no significant relationship between the two variables.

Front

How do you determine the best fit line in a scatterplot?

Back

The best fit line is determined by minimizing the distance between the line and all the data points, often using methods like least squares.

Front

What is the significance of the slope in a linear relationship?

Back

The slope indicates the rate of change between the two variables; a positive slope means both variables increase together, while a negative slope means one variable increases as the other decreases.

Front

What is the correlation coefficient?

Back

The correlation coefficient is a numerical measure that indicates the strength and direction of a linear relationship between two variables, ranging from -1 to 1.

Front

What does a correlation coefficient of 0 indicate?

Back

A correlation coefficient of 0 indicates no linear relationship between the two variables.

Front

How can you interpret a scatterplot with a strong positive correlation?

Back

A scatterplot with a strong positive correlation shows that as one variable increases, the other variable also increases significantly.