Statistical Relationship

The n-1 in the denominator of a correlation formula indicates. (Points : 1)   a multiple correlation   a negative correlation   a correlation designed for a group of data of any size   a correlation from sample data Which of the following defines a linear relationship between variables? (Points : 1)   As one variable rises and falls, the other does likewise.   The relationship is positive or negative, but not both.   The relationship between variables depends upon the range of the data.   As one variable increases or decreases, the other tends to level o Under what circumstances would SEest = 0? (Points : 1)   If sy = 0   If sy = 1.0   If rxy= 0   If rxy = 1.0 Two variables are considered to be independent if the correlation of scores on the variables turns out to be close to___. (Points : 1)   +1.00   0.00   -1.00 Another name for the b value in a regression solution is _________. (Points : 1)   the intercept   the regression coefficient   the error term   the criterion value Theoretically, the standard error of the estimate is ___________. (Points : 1)   the mean of all possible error scores   the sum of all possible error scores   the standard deviation of all error scores   the sum of all error score variances Each point in a scatter plot represents which of the following? (Points : 1)   A predicted value   A measure of either the x or the y variable   The group to which the measure belongs   The measure of both variables The coefficient of determination (rxy2) is defined by __________. (Points : 1)   the statistical relationship between x and y.   how linear the relationship between x and y is.   how much of y can be explained by changes in x.   the variation in the x/y relationship due to chance. A negative correlation between the predictor and criterion variables will be reflected in __________. (Points : 1)   an increased error in the prediction   a non-linear relationship between x and y   a regression line that declines left to right   a solution that predicts unusually low values of y Since a correlation of +1 is considered “perfect,” a correlation of -1 is as “imperfect” as can be. (Points : 1)   True   False

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