Probably because of history relation.
Manipulated Variable:The speed working on maths problems
Responding Variable: The group that use¬ using a calculator
Controlled Variable:The same maths quetions
Answer:
The correct answer is - qualitative measurements.
Explanation:
When the information about characteristics is tough to describe of define by measuring or represent numerically, qualitative measurements are used to describe it.
These measurements are carried out by information collected through all senses such as vision, hearing, touch, smell, and taste. For example softness of the skin, the color of hair.
Thus, the correct answer is - qualitative measurements.
The answer is rain percolates through the pavement into the ground below, causing cracks in the pavemen
2.66667 m/sec use the equation for speed d/t = s