<p>I have a copy of The Practice of Statistics (Yates/Moore) First Edition, which only covers the use of the TI-83. I have a TI-89 and do not plan to borrow or buy a TI-83 for the statistics exam. How important is it that I know how to use my 89 for the exam? Is it worth it to buy a copy of the Second Edition, which covers the 89, for $10-20? I'm aiming for a 5. Are there any other benefits to getting the Second Edition?</p>
<p>Thanks.</p>