I have accuracy scores on 6 different tests. I have calculated the percentage of the accuracy in each test so that each of the tests has a score on the same scale (0-100%). I want to see how well do each of the 6 different tests correlate with a 7th test. I have been told I should run a multiple regression analysis or a linear model. I was even explained that to run the linear model I should consider an equation as follows:

y = B0 + B1.test1 + B2.test2 + B3.test3 .... + error

B0 = intercept

B1..Bn = estimate

However, now that I have the data I have no idea what to do or how to do it.

Any help will be greatly appreciated.

Best