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Statistical dependence

STATS PRACTICE

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Statistics
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Regression analysis
Design of experiments
Econometrics
Statistical dependence
Dependent and independent variables
Correlation and dependence
Scatter plot
Coefficient of determination
Statistics
Causality
Confounding
Plot

AP Statistics Name ____________________________________________ Chapter 4 Practice Test Part I - Multiple Choice Suppose that the scatterplot of (log x, log y) shows a strong positive correlation Which of the following must be true? The variables x and y also have a correlation close to 1. A scatterplot of (x, y) shows a strong nonlinear pattern. The residual plot of the variables x and y shows a random pattern. I only II only III only I and II I, II, and III What is the purpose of residual plots? To determine causation. To assess the type of relationship that exists between x and y. To check the appropriateness and fit of the regression equation for the data. To measure the variability in the residuals. To provide predictions for the response variable.

stats

Subject: 
Statistics
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Statistics
Categorical data
Probability theory
Data analysis
Contingency table
Statistical dependence
Marginal distribution
Frequency distribution
Probability distribution
Conditional probability distribution

Data--Types of Variables Categorical A variable that names categories (whether with words or numerals) Eye Color (brown, blue, green), T-shirt size (large, medium, small), type of vehicle Quantitative A variable that are numerical values taken from an individual Weight (117 lbs, 170 lbs, 253 lbs) School administrators collect data on students attending the school. Which of the following variables is quantitative? B) class (freshman, soph., junior, senior) D) whether the student is in AP classes C) whether the student has taken the SAT A) grade point average E) none of these Ways to display categorical data Frequency Table ? lists categories and counts for each Class Count First 325 Second 285 Third 706 Crew 885 COUNTS! Ways to display categorical data
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