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Unformatted text preview: helpful. A general review of your college courses is probably the best preparation for the test. However, the test covers a broad range of subject matter, and no one is expected to be familiar with the content of every question. Use this practice book to become familiar with the types of questions in the GRE Biology Test, paying special attention to the directions. If you thoroughly understand the directions before you take the test, you will have more time during the test to focus on the questions themselves. Test-Taking Strategies The questions in the practice test in this book illustrate the types of multiple-choice questions in the test. When you take the actual test, you will mark your answers on a separate machine-scorable answer sheet. Total testing time is two hours and fifty minutes; there are no separately timed sections. 8 BIOLOGY TEST PRACTICE BOOK What Your Scores Mean Your raw score, that is—the number of questions you answered correctly minus one-fourth of the number you answered incorrectly—is converted to the scaled score that is reported. This conversion ensures that a scaled score reported for any edition of a Subject Test is comparable to the same scaled score earned on any other edition of the same test. Thus, equal scaled scores on a particular Subject Test indicate essentially equal levels of performance regardless of the test edition taken. Test scores should be compared only with other scores on the same Subject Test. (For example, a 680 on the Computer Science Test is not equivalent to a 680 on the Mathematics Test.) Before taking the test, you may find it useful to know approximately what raw scores would be required to obtain a certain scaled score. Several factors influence the conversion of your raw score to your scaled score, such as the difficulty of the test edition and the number of test questions included in the computation of your raw score. Based on recent editions of the Biology Test, the following table gives the range of raw scores associated with selected scaled scores for three different test editions. (Note that when the number of scored questions for a given test is greater than the range of possible scaled scores, it is likely that two or more raw scores will convert to the same scaled score.) The three test editions in the table that follows were selected to reflect varying degrees of difficulty. Examinees should note that future test editions may be somewhat more or less difficult than those test editions illustrated in the table. Range of Raw Scores* Needed to Earn Selected Scaled Score on Three Biology Test Editions That Differ in Difficulty Raw Scores Scaled Score Form A 800 700 600 500 128-130 101-103 74-76 47-49 Form B 124-125 95-97 67-69 39-41 Form C 120-121 92-94 64-66 37-39 Number of Questions Used to Compute Raw Score 199 198 200 *Raw Score = Number of correct answers minus one-fourth the number of incorrect answers, rounded to the nearest integer. For a particular test edition, there are many ways to earn the same raw score. For example, on the edition list...
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