PSYB07H3 Lecture Notes - Lecture 3: Quartile, Interquartile Range, Variance
Document Summary
Psyb07 descriptive statistics lecture 3, tutorial 2, chapter 2 (pg. Normal distribution/bell curve: single peak, symmetrical, can add a constant ex. adding extra marks. Multimodal: many unbalanced peaks: ambiguous, major modes highest peaks, minor modes lowest peaks. Central tendency: the t(cid:455)pi(cid:272)al (cid:448)alue/ (cid:862)(cid:272)e(cid:374)ter(cid:863) of a distri(cid:271)utio(cid:374) Central tendency- mode: the mode is the value corresponding to the peak of the distribution, most common score. If there is more than 1 mode, list them all. Central tendency- median: the midpoint of the distribution, midpoint of the data distribution, half of scores are lower, half are higher, median 50th percentile, meaning 50% of the scores fall below the median. Rank order the data: 0, 4, 4, 6, 6, 8, 8, 8, 9. Rank order the data: 0, 4, 4, 6, 8, 8, 8, 9. Operation for a list of scores (x) x = 0, 4, 9, 8, 4, 6, 8, 8, 6.
