I don't understand the MAD can someone explain it to me.

Mean absolute deviation (MAD) of a data set is the average distance between each data value and the mean. Mean absolute deviation is a way to describe variation in a data set.

hope this helps.

A.) r = -0.3669

B.) r = -0.3669

C.) there is no change in the value of r

Step-by-step explanation:

Row 1 : 20, 21, 37, 48, 56, 63, 72

Row 2: 177, 158, 164, 171, 129, 186, 134

A.) Taking Row 1 values as X. And row 2 values as Y.

Regression equation using the correlation Coefficient calculator :

r = -0.3669

B) Taking Row 1 values as Y. And row 2 values as Y.

Regression equation using the correlation Coefficient calculator :

r = -0.3669

C.) the correlation does not change.