Understanding Scatter Plots and Correlation

The video tutorial explains how to create a scatter plot with eight points to support a study showing that increased daily exercise correlates with a lower resting heart rate. It describes the axes, plots the points, and emphasizes the negative correlation between exercise and heart rate. The tutorial concludes by affirming that the scatter plot supports the study's hypothesis.

What is the main objective of creating the scatter plot in this study?

• To prove that exercise has no effect on heart rate.

• To show that more exercise increases resting heart rate.

• To illustrate that heart rate is unrelated to exercise.

• To demonstrate that more exercise decreases resting heart rate.

What does the horizontal axis represent in the scatter plot?

• Age of the participants.

• Minutes of exercise per day.

• Resting heart rate in beats per minute.

• Calories burned during exercise.

What is the expected trend in the scatter plot as exercise increases?

• A downward trend in resting heart rate.

• No change in resting heart rate.

• A random pattern in resting heart rate.

• An upward trend in resting heart rate.

What is the resting heart rate of someone who does not exercise at all, according to the example?

• 75 beats per minute.

• 85 beats per minute.

• 65 beats per minute.

• 95 beats per minute.

Why is it important for the scatter plot to show a downward trend?

• To demonstrate a random correlation.

• To indicate a positive correlation.

• To support the study's hypothesis.

• To show that exercise increases heart rate.

How many points are plotted on the scatter plot to support the study?

• Seven points.

• Five points.

• Eight points.

• Six points.

What type of correlation does the scatter plot demonstrate?

• No correlation.

• Negative correlation.

• Positive correlation.

• Random correlation.