SOC 1010 Lecture Notes - Lecture 6: Spurious Relationship, Scientific Control, Standard Deviation
26 Sep 2016
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Know how to do standard deviation: why use standard deviation? a. i. these scores go in a particular pattern. a. ii. About 2/3 fall within 1 standard deviation of the mean: example: iq scores b. i. Normal iq is less than 1 standard deviation away from the mean b. iii. 1. Most university students have above iqs between 115 and 130 b. iii. 2. Iq more than 2 standard deviations away from the mean is considered exceptional b. iii. 3. About 5% of scores usually fall more than 2 standard deviations away from the mean and are considered exceptional. Experiment and research design lingo: variables a. i. Independent variable: a variable that causes change in another variable a. ii. Dependent variable: a variable that changes due to the influence of another variable a. iii. Two variables related in some way, not necessarily through cause and effect a. iv. Spurious correlation: assuming a causal relation between two variables when one exists because a third, hidden variable causes both a. v.
