Stat Practice One

Front

What is the relationship statement for a scatter plot showing ice cream sales and temperature?

Back

As the outside temperature increases, the ice cream sales increase.

Front

Which of the following involves only quantitative variables: age versus race, number of siblings versus types of pets, number of family members vs types of vacation, or years of experience versus amount of money saved?

Back

Years of experience versus amount of money saved.

Front

What type of correlation is indicated by a scatter plot where one variable increases while the other decreases?

Back

Negative correlation.

Front

In the regression line equation y = 1.4x + 47, what does the y-intercept represent?

Back

Students who studied 0 minutes earned an average of 47 points.

Front

Which of the following is an example of qualitative data: Gender, Age, Blood pressure, or Resting heart rate?

Back

Gender.

Front

What is a scatter plot?

Back

A graphical representation showing the relationship between two quantitative variables.

Front

Define correlation in statistics.

Back

Correlation measures the strength and direction of a linear relationship between two variables.

Front

What does a positive correlation indicate?

Back

As one variable increases, the other variable also increases.

Front

What is the purpose of a regression line in a scatter plot?

Back

To model the relationship between the variables and make predictions.

Front

What does it mean if there is no correlation between two variables?

Back

Changes in one variable do not predict changes in the other variable.