Are the test scores on the sat study guide book accurate?

<p>i bought the book and ive been studying on and off. The first time i took the real sat i got a 1180, ill be honest, i didnt study that much because of summer. I just took the practice test on the sat study guide and i got a 1330. Im taking my sats again in November so i going to keep studying, but i wanted to know if the sat practice test are accurate? </p>