Esc_Ps 4170 1st Edition Exam # 2 Study GuideChapter 10- The phenomenon in nature results in a distribution. Mathematically, this distribution phenomenon has identifiable distribution properties and is referred to as the standard normal distribution- Characteristics of the SND:1. The mean is the standard normal distribution2. The distribution is symmetrical3. The distribution of the curve is bell shaped4. The proportion of the area under different parts of the distribution is unequal5. The standard normal distribution allows us to compare multiple measures6. Z values can easily be converted - Z-scores are standard score translations of raw scores often used when interpreting a score within a distribution of scores. - Raw scores into percentile ranks equation -- Z = (X-barX) / SD- Z-scores into raw scores -- Z = (X-barX) / SD- T-scores equation – T= 10 ( (X-barX) / SD)+50Chapter 11- Correlational studies express how variables relate to each other- Pearson Product Moment Correlation (r) – r = (sigma (X-barX)(Y-barY) ) / sqrt (SSx)(SSy)- Spearman Rank Correlation Coefficient (rs) – rs = 1 – (6 (sigmaDsquared) ) / (N (Nsquared – 1) )Chapter 12- Constructing Regression Lines – Y = a + b(X)- B = R(x,y) ( (SDy)/(SDx) )- A = barY – b(barX)These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Y’ = barY + R(x,y) ( (SDy)/(SDx) ) (X- barX)- Sest.y = SDy sqrt( (N (1-rsquared) ) / (N-2)