Exam 23: Bivariate Statistical Analysis: Measures of Association

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If the correlation between two variables is - 0.75,this means that:

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In a correlation matrix,the correlations in the main diagonal are all equal to:

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The ____ is a measure obtained by squaring the correlation coefficient.

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If the purpose of the regression analysis is forecasting,then standardized regression estimates must be used.

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One way to determine the relationship between X and Y is to simply visually draw the best-fit straight line through the points in the figure.

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Which of the following is the standard form for reporting observed correlations among multiple variables?

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If there is no relationship between two variables,the correlation coefficient between them would be:

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When there is a strong positive correlation between two variables,but,in fact,both variables are caused by a third variable,the relationship between the first two variables is said to be:

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Discuss the common procedures for testing association for data that are nominal,ordinal,and interval/ratio.

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A correlation coefficient indicates both the ____________________ of the relationship between two variables and the ____________________ of this relationship.

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Discuss the steps in interpreting a simple regression output.

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In simple regression,raw parameter estimates reflect the measurement scale range.

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In regression analysis,the equation of a straight line is Y = a + b X.

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Discuss the pros and cons of raw regression estimates and standardized regression estimates and discuss when each is appropriate.

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The explanatory power of regression lies in hypothesis testing.

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A bivariate statistical technique that is used to measure the strength of the relationship between two variables is called the:

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Covariance is the extent to which a change in one variable corresponds systematically to a change in another.

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If the correlation between two variables is -.55,the coefficient of determination is approximately ____________________.

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Which of the following is most appropriate if the purpose of the regression analysis is forecasting?

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In testing for the significance of a correlation,the null hypothesis is that the correlation is equal to ____________________.

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