Creating Scatter Plots and Analyzing Correlation with TI-Nspire

What does the correlation coefficient indicate?

• The average of the data points

• The strength of a linear relationship

• The range of the data set

• The median of the data points

Which variable is considered the explanatory variable in the example provided?

• Height

• Age

• Blood pressure

• Weight

What is the first step before calculating the correlation coefficient?

• Entering data into the calculator

• Creating a scatterplot

• Running a regression analysis

• Naming the variables

Which menu option is used to add a data and statistics screen on the TI Nspire?

• Option 7

• Option 5

• Option 3

• Option 1

What is the correlation coefficient value obtained in the example?

• 0.867

• 0.968

• 0.869

• 0.967

What does a correlation coefficient close to 1 indicate?

• A weak linear relationship

• A strong linear relationship

• A nonlinear relationship

• No relationship

What should you always check before reporting the correlation coefficient?

• The mean of the data

• The scatterplot for linearity

• The median of the data

• The range of the data

What does a positive correlation indicate in the context of the example?

• As age increases, blood pressure decreases

• As age increases, blood pressure increases

• As age decreases, blood pressure increases

• No relationship between age and blood pressure

What is the significance of the slope in relation to the correlation coefficient?

• The slope and correlation coefficient are unrelated

• The slope determines the mean of the data

• The sign of the slope matches the sign of the correlation coefficient

• The slope determines the range of the data

What is the default setting for stat diagnostics on the TI Nspire?

• Off

• On

• Manual

• Custom