Correlation
Not what you're looking for?
1. Discuss the strengths and weaknesses of correlational and regression studies; discuss concepts such as positive and negative correlations, correlation coefficients, confounding, and causality.
2. You read an interesting study in the paper that says that during any given year, statistics show that ice cream consumption and the crime rate are correlated - as ice cream consumption rises, the crime rate rises; as ice cream consumption drops, so does the crime rate. Explain this spurious correlation.
Purchase this Solution
Solution Preview
1. Correlation analysis measures the linear association between variables. The correlation coefficient values are always between -1 and +1. A correlation coefficient of -1 means the variables are perfectly inversely related, a score of 0 indicates there is no linear relationship between the variables, and a score of +1 means the variables are perfectly related. There is also the possibility of confounding variables with correlation analysis that could make it look like there is a linear relationship that is not really true. An example of a possible confounding variable is water usage and baseball cap sales. More water ...
Purchase this Solution
Free BrainMass Quizzes
Know Your Statistical Concepts
Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.
Measures of Central Tendency
This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.
Measures of Central Tendency
Tests knowledge of the three main measures of central tendency, including some simple calculation questions.
Terms and Definitions for Statistics
This quiz covers basic terms and definitions of statistics.