Correlation coefficient:

The value of correlation coefficient (r) ranges from –1 to 1.

The value of r closer to –1 or 1 indicates that there is strong correlation between two quantitative variables, whereas, the value of r closer to 0 indicates that there is weak or no correlation between variables.

The positive value of correlation indicates that both the variables (say x and y) are in same direction, whereas, the negative value of correlation indicates that both the variables are in opposite direction.

Match the following:

In scatter plot 1, the variables x and y are in opposite direction and it is approximately linear. Therefore, it has highest negative correlation. Among the given correlation values, it is clear that the r value for the scatter plot 1 is –0.998.

Similarly, by comparing the scatter plots with the r values, the scatterplots are matched with their respective r values as shown below:

Scatterplot 1, r = –0.998

Scatterplot 2, r = –0.353

Scatterplot 3, r = 0.998

Scatterplot 4, r = 0.723

Scatterplot 5, r = 0.353

The value of correlation coefficient (r) ranges from –1 to 1.

The value of r closer to –1 or 1 indicates that there is strong correlation between two quantitative variables, whereas, the value of r closer to 0 indicates that there is weak or no correlation between variables.

The positive value of correlation indicates that both the variables (say x and y) are in same direction, whereas, the negative value of correlation indicates that both the variables are in opposite direction.

Match the following:

In scatter plot 1, the variables x and y are in opposite direction and it is approximately linear. Therefore, it has highest negative correlation. Among the given correlation values, it is clear that the r value for the scatter plot 1 is –0.998.

Similarly, by comparing the scatter plots with the r values, the scatterplots are matched with their respective r values as shown below:

Scatterplot 1, r = –0.998

Scatterplot 2, r = –0.353

Scatterplot 3, r = 0.998

Scatterplot 4, r = 0.723

Scatterplot 5, r = 0.353