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simenytakèläunch.jsp?course assessment.id-_141248 1&course; id-_1180 w Question Completion Status: QUESTION 1 Ir all the points of a scatter diagram lie on the least squares regression line,then the coffient of on this data is: for these variables based either 1 or -1, depending upon whether the relationship is postive or negative could be any value between - 1 and QUESTION 2 Given the following regression model: y 16+2.5x. What is the residual for an observation (-6.y-30 0.5 QUESTION 3 Save All Answers Close M Click Save and Submit to save and submit. Click Sove All Answers to sove all answers

Explanation / Answer

Q1)If all the points of a scatter diagram lie on the least squares regression line, then the coefficient of determination for these variables based on this data is:

Answer:b)1

Q2)Given the following regression model y=16+2.5x what is the residual for an observation

(x=6,y=30),

Answer:-a) -1

Q3)In a simple Linear regression problem, r and b1...

Answer:-c)Must have the same sign

Q4)

The following estimated regression equation related demand for a product (y) and the price of the product (x), y= 100-20x . If price is increased by 2 units, then demand will:

Answer:- decrease by 40 units

Q5)If x and y in a simple linear regression model are totally unrelated:

Answer:d)the correlation cofficient wood be -1

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