Can someone. Please help me please

Researchers were interested in whether relaxation training decreases the number of headaches a person experiences. they randomly assigned 20 participants to a control group or a relaxation training group and noted the change in number of headaches each group reported from the week before training to the week after training. which statistical analysis should be performed to answer the researchers' question?

What is the 12th term of b(n)=-4-2(n-1)

The function models the number of accidents per 50 million miles driven as a function