Given that 75% could already increase their test score so let us see.
![0.75\cdot150=112.5](https://img.qammunity.org/2023/formulas/mathematics/college/lpf0jb6uqnmz62zvh4uohc7irepjcfu840.png)
Since this number is smaller than the one that they found after testing a new method in their tutoring center, so yes there is a bit of evidance that the new method works. so the center can continue using their new method.!