Which of the following statements regarding the coefficient of correlation is true Quizlet

Consider the following sample regression equation y=150−20x, where y is the demand for Product A (in 1,000s) and x is the price of the product (in $). The slope coefficient indicates that if ______________.

a. As the price of Product A increases by $1, demand decreases by 20 units, on average and all else constant.
b. As the price of Product A increases by $1, demand increases by 20 units, on average and all else constant.
c. As the price of Product A increases by $1, demand decreases by 20,000 units, on average and all else constant.
d. As the price of Product A increases by $1, demand increases by 20,000 units, on average and all else constant.

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Refer again to Theodora's findings presented on the table. Let's assume for this question that Theodora set her alpha at 0.01, which of the following is true?

a. Theodora found a significant difference between men and women's
quality of life, but not between men and women's productivity.

b. Theodora found a significant difference between men and women's
productivity, but not between men and women's quality of life measures

c. Theodora found a significant difference between men and women for
both productivity and quality of life measures.

d. Theodora found no significant difference between men and women for
neither productivity nor quality of life meas

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Which of the following statements is true about correlation coefficient?

The correct answer is d. The correlation value between the given two variables denotes the strength and direction of the linear relationship between them. Its value always lies between -1 and 1.

What does a coefficient of correlation of 0.70 infer quizlet?

It describes the relationship between two variables. What does a correlation coefficient of 0.70 infer? There is almost no correlation because 0.70 is close to 1.0. 70% of the variation in one variable is explained by the other variable.

Which of the following is the formula for the correlation coefficient r quizlet?

r = Σ(X−X)(Y−Y)(n−1)sxsyΣ(X-X)(Y-Y)(n-1)sxsy. Match the variables to their description.

What does a coefficient of correlation of .70 mean?

Values between 0.7 and 1.0 (-0.7 and -1.0) indicate a strong positive (negative) linear relationship via a firm linear rule. The value of r squared is typically taken as “the percent of variation in one variable explained by the other variable,” or “the percent of variation shared between the two variables.”

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