STAT 1450 Chapter Notes - Chapter 3: Normal Distribution, Video Lesson, Standard Deviation
9 Oct 2018
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Document Summary
Guided notes associated with the lecture videos for sections 3. 1 & 3. 2. Connecting chapter 3 to our current knowledge of statistics. Quick review: chapters 1 and 2, we explored distributions for quantitative variables by. Looking for overall patterns and 4 key features (center, spread, shape, and outliers) Now we are going to extend this by: approximating the overall pattern of a large sample size with a smooth curve, using this smooth curve to determine probabilities of events. A density curve describes the overall pattern of a distribution. The area under the curve for a given range of values along the x-axis is the proportion of the population that falls in that range. The curve has an area of exactly 1 underneath it. The concepts of shape, center, and spread/variability are still used to describe a density curve. Outliers will be less relevant here, as we"ll focus on symmetric distributions.
