PSY100H1 Lecture Notes - Reticular Formation, Caudate Nucleus, Prefrontal Cortex
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PSY100H1 Full Course Notes
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One way to look at variability is to look at the range. Another way is through a measure of standard deviation. Standard deviation measures how far, on average, each sore is from the mean. For example, if the class average on a test is 75%, and you got 85% on the test. You did better than the average student, but without standard deviation, it doesn"t say when you fall among the class. Knowing that the standard deviation is 5, it shows that most of the scores are very clustered. If the mean is still 75, but the distribution has changed, then the standard deviation is lager. So standard deviation shows whether your scores are close to each other or more scattered. Scatterplots: graphs that illustrate the relationship between two variables (e. g. , beer sales and temperature). Positive correlations are given positive numbers up to the number 1. 0.
