Exam 17: A: Bivariate Correlation and Regression

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One way to study the relationship between the dependent and independent variable is to plot the data in a scatter diagram.

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A scatter plot compares actual data to a predicted relationship between 2 variables.

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The R2 statistic ranges from -1 to 1.

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____________ is the mathematical technique for fitting a line that best describes the relationship between two variables.

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Interpret the correlation coefficient for the following data: Sales Sales Training Score 45,000 98 34,500 74 23,750 57 51,450 99 41,000 85 The resulting correlation coefficient is +.98 and the probability of insignificance is 3%.

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Bivariate statistical techniques are often used to establish cause and effect relationships between two or more variables.

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An R2of 0 indicates no relationship between variables.

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In regression,the unexplained variation is referred to as error sum of squares (SSE).

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The least squares estimation procedure often results in a perfectly straight line.

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___________ are statistical methods of analyzing the relationship between two variables.

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When the value of one variable increases at exactly the same rate as another variable decreases,this is said to be a ___________________relationship.

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How would you interpret the relationship between Education and Age?

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_______________ refers to analysis is one of strength of the linear relationship between two variables when one is considered the independent variable and the other the dependent variable

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Research on fear appeal in advertising suggests that a moderate amount of fear is most effective at achieving persuasion.That is,using not enough fear or too much fear in advertising will not be effective.This is an example of what type of relationship that regression might find?

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Bivariate regression looks at the relationship between many variables.

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The percentage of total variation in the dependent variable that is described by the independent variable is expressed by_________.

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In bivariate regression,both the independent and dependent variables are measured in the form of nominal and/or ordinal data.

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Which of the following is the appropriate technique for correlation analysis,which involves metric (interval or ratio)data?

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The explained variation by the regression is referred to as the:

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The coefficient of determination is used in correlation analysis.

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