Psychology 2810 Lecture Notes - Lecture 3: Normal Distribution, Frequency Distribution, Standard Score

• School: Western University
• Department: Psychology
• Course: Psychology 2810
• Professor: Livia Velseka

Document Summary

Properties of mond-shaped symmetrical distributions frequency distribution: all possible scores that could occur; frequency of each score. Mssd: mound shaped; bell curve mean is at the center of the peak standard deviation value: 6 key points of the mssd: across all mssd, these percentages will always be the same: Percentiles and interpolation in mssd percentile: point on a distribution below which a specific percentage of scores can be found n be found. P50 is the point on the mssd with 50% of scores above and 50% of scores below -- this is the mean this is. Therefore the students performance relative to other students increased from the first exam to the second exam. t exam. Chebyshev"s theorem applicable to all distributions, but especially helpful for skewed distributions. ***have to convert it to a z score cause for chebyshev"s theorum, we can only use standard deviation units -- the theorum works because the absolute values are the same.