Arithmetic Essay Examples

Arithmetic Wechsler IQ Grade 3 Grade 5 Grade 8 Grade 5 100 3.0 5.0 8.0 5.0 μ σ 15 1.0 1.4 1.9 1.1 An IQ score above 115 is obtained by what percent of the population? Since the intelligence scores from a normal curve, roughly 34 % of the scores are between the mean (100) and the standard deviation (15) above the mean. For a normal distribution, 50 % of the scores fall below the meanwhile 50 % fall above the mean. Therefore, about 84 %( 50 % below mean and 34 %between mean and the score of 115) of scores are below 115. As such, since 84 % fall under 115, therefore16 % (100 % - 84 %) must fall above the 115 score of 115. If a fifth-grade student obtains a percentile rank of 84 in reading, what is the...

  • Words: 825
  • Pages: 3
Read more