Answer Happy

Rather than being divided into 100 parts, as in the case of percentiles, a distribution is sometimes divided into 9 parts called stanines, a contraction of the term standard nine. Stanines are whole numbers numbered from a low of 1 to a high of 9, with 5 representing average performance. The stanines that correspond to the percentile intervals are shown in the following graph. Average Below Average Above Average Poor Superior 4% 7% 12% 17% 20% 17% 12% 7% 3 6 7 Ne Stanine 1 OD 4 OL 9 Percentile 4 23 40 60 77 a. Determine the stanine for the 55th percentile. b. The following Stanford Achievement Test chart records a stanine score beside each percentile. For example, under Math Comp, the 54th percentile corresponds to a stanine score of 3. Determine the student's local mathematics application stanine score missing from that chart. Stanine score:

a. Determine the stanine for the 55th percentile. a a b. The following Stanford Achievement Test chart records a stanine score beside each percentile. For example, under Math Comp, the 54th percentile corresponds to a stanine score of 5. Determine the student's local mathematics application stanine score missing from that chart. Stanine score: Stanford ACHIEVEMENT TEST SCORE TYPE COMP GR 4 NORMS GR 4.8 LEVEL INTER1 FORM E STUDENT NO 400000044 OTHER INFO TEST DATE 5/10/99 RS/NO POSS NAT'L PR-S LOCAL PR-S GRADE EQUIV 68-6 5.5 AGE 9 READING SPELLING LANGUAGE VOCAB- ULARY MATH APPL 32/40 37740 40/53 36 90 96 - 9 6.4 8.9