Means of the variables carat and price by cut.

cut carat price
Fair 0.881 3995.700
Good 0.857 4180.767
Very Good 0.792 4004.645
Premium 0.939 5200.208
Ideal 0.688 3169.228

Variance of the variables carat and price by cut.

cut carat price
Fair 0.298 19885489
Good 0.245 17992468
Very Good 0.236 17683099
Premium 0.262 22296469
Ideal 0.168 11041605

Price of diamonds by their cart for each color

Plot A

Plot B