QUESTION 18 1 points Save Answer Assume you have conducted a simple linear regre
ID: 2907073 • Letter: Q
Question
QUESTION 18 1 points Save Answer Assume you have conducted a simple linear regression analysis of profit amount by sales amount and the interval estimate of the slope coefficient is from -0.20 to 0.60. Choose the following that represents what should be concluded from the analysis O 1, fail to reject the null hypothesis and conclude that the slope may be zero (average profit per unit increase in sales may be zero for the population of sales from which this O 2.fail to reject the null hypothesis and conclude that the slope is not zero (average profit per unit increase in sales is greater than zero for the population of sales from which O 3.reject the null hypothesis and conclude that the slope may be zero (average profit per unit increase in sales may be zero for the population of sales from which this sample ?4. reject the null hypothesis and conclude that the slope is not zero (average profit per unit increase in sales is greater than zero for the population of sales from which this O 5. all of these are true O 6, none of these are true sample was selected) this sample was selected) was selected) sample was selected) QUESTION 19 1 pointsSave Answer Determine the value of the residual for a least squares simple linear regression model where the predicted value of y (y-hat) is 50.52, for a given value of x, and the observed value of y from the sample is 82.89. formula 14.10 Enter your response to 2 decimals (i.e. 2.12). Include the negative sign, if appropriate QUESTION 20 1 points Save Answer In a regression analysis, the error term (epsilon) is a random variable with a mean or expected value of zero 2. one O 3.any positive value O 4.any valueExplanation / Answer
18)
option 1 is correct: fail to reject null hypothesis and conclude that slope may be 0...
19)
residual =actual-predicted =82.89-50.52=32.37
20)
expected mean value is 0