AP Statistics Section 2.1 B. Data Analysis Toolbox When describing distributions, always use the following strategies: 1 . Plot your data: make a graph, usually a __________ or a __________. histogram. stemplot.
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Data Analysis ToolboxWhen describing distributions, always use the following strategies:1. Plot your data: make a graph, usually a __________ or a __________.
3. Calculate a numerical summary to describe the _______ and ________.Note: If the distribution is roughly symmetrical use _________________________.If the distribution is skewed use _________________.
mean and standard deviation
median and IQR
Density CurvesConsider the histogram below. We can sketch a smooth curve through the tops of the histogram for a good description of the overall pattern of the data.
The curve is a mathematical model for the distribution. A mathematical model is an _________description. This smooth curve is called a ________ curve.
A density curve has the following properties:*the curve is always ____ or _______ the horizontal axis, and*the area under curve represents allobservations and equals ___.
divides the area under the curve in half.
the curve would balance if it was made out of some solid material.