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Correct Answer: roughly commensurate with his grade level
when mr. ross discovers that richard, a sophomore, has achieved a score in the 47th percentile on a standardized sub-test of reading comprehension, he can make a reasonable assumption regarding richard's reading abilities. the percentile rank indicates that richard scored better than 47% of the test-takers, situating him near the middle but slightly below the average in comparison to his peers nationally who took the same test.
percentiles are a statistical measure indicating the relative standing of a datum within a dataset. a percentile rank specifically does not convey the exact level of skill, but rather how the score compares to a broader group. in the context of educational assessments, being in the 47th percentile means richard's performance was close to the middle, suggesting his reading skills are typical for his age and grade level. however, it is critical to note that this does not imply a precise alignment with grade-specific expectations, only that his abilities are close to average among his peers.
conclusively, mr. ross can deduce that richard's reading comprehension abilities are not significantly above or below what might be expected of an average sophomore. this interpretation helps in understanding where richard stands in a broad, comparative academic context but requires more detailed or specific diagnostic assessments to pinpoint exact strengths or areas in need of improvement. if richard's score were substantially higher (e.g., in the 80th percentile or above), it might suggest that his reading skills surpass his grade level expectations. conversely, a significantly lower score might indicate the need for additional support or intervention.
therefore, when considering actions based on this percentile rank, mr. ross should recognize that while richard's reading ability appears roughly commensurate with his grade level, the nature of percentile ranks as comparative rather than absolute measures means that educational decisions should ideally be supported by more comprehensive evaluations of richard's academic abilities and needs.
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