Question

Many states assess the skills of their students in various grades. One program that is available for this purpose is the National Assessment of Educational Progress (NAEP). We assumed that the NAEP U.S. mathematics scores for twelfth-grade students are approximately Normal with the reported mean and standard deviation, N(157 , 30 ). For the twelfth-grade U.S. history scores, the following percentiles are reported: Percentile Score 10% 120 25% 136 50% 158 75% 137 90% 137 Let's check that assumption. In addition to means and standard deviations, you can find selected percentiles for the NAEP assessments. Use these percentiles to assess whether or not the NAEP U.S. history scores for twelfth-grade students are approximately Normal. Use software to compute ( ±±0.01) the scores with N(157 , 30 ): Percentile Score Score withN(157 ,30 ) 10% 120 25% 136 50% 158 75% 137 90% 137

Answer 1

Date Percentile Score with N (51,30) เก ใ๐ 1499% 256 (53: 3L 566 153 • 0 15 16 \แ0: 69 90 , 1 6 4 0 2 CS Scanned with CamScanner