Calculating Correlation Coefficients with Desmos

What is the main task you have been asked to perform in this tutorial?

• Develop a trendline and calculate a correlation coefficient using decimals.

• Create a pie chart of calcium intake.

• Calculate the average calcium intake.

• Analyze the diet of sports science students.

What is the relationship being studied in the data provided?

• Calcium intake and knowledge about calcium.

• Knowledge about calcium and sports performance.

• Calcium intake and physical activity.

• Calcium intake and dietary habits.

How is the data entered into the table if it is not already in Excel form?

• It is automatically generated.

• It is scanned from a document.

• It is entered by hand.

• It is imported from a database.

What should you do if the data is already in Excel form?

• Enter it by hand.

• Copy and paste it into the table.

• Scan it into the program.

• Ignore it.

What is the first step in creating the scatter plot?

• Calculating the average values.

• Entering the data into the table.

• Drawing the axes.

• Setting the range for X and Y variables.

What does the trendline equation represent in this context?

• The relationship between knowledge score and calcium intake.

• The average calcium intake.

• The difference between highest and lowest calcium intake.

• The total calcium intake.

What does a positive correlation coefficient indicate?

• X and Y are unrelated.

• As X increases, Y increases.

• There is no relationship between X and Y.

• As X increases, Y decreases.

What is the highest possible value for a correlation coefficient?

• 0

• 0.5

• 1

• 10

What does a correlation coefficient of 0.882 indicate?

• A weak negative correlation.

• No correlation.

• A strong positive correlation.

• A weak positive correlation.

What is the purpose of calculating the line of best fit?

• To create a pie chart.

• To determine the relationship between variables.

• To find the average value.

• To calculate the total sum.