Which of the following is true? Select one: a. If a regression line equation has

Question

Which of the following is true? Select one: a. If a regression line equation has a negative slope, then as one variable decreases, th other variable probably increases. O b. Regression line equation can only be used if positive linear correlation has been established at a reasonably chosen significance level. O C. If a linear correlation coefficient of a bivariate sample is zero, then there is no relationship between the two corresponding population variables. O O d. The linear correlation coefficient is always between 0 and 1. O e. A linear correlation coefficient of -0.62 suggests a stronger linear relationship than a linear correlation coefficient of-0.82.

Explanation / Answer

a) The correct answer is a. If the equation has negative slope , then as one variable decreases, the other increases.

Let equation be y = c-x

or y+x = constant.

Hence, as x increases, y decreases.

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