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The Cherry Manufacturing Company’s chief engineer examines a random sample of 10 spot welds of steel. In each case, the shear strength of the weld and the diameter of the weld are determined, the results being as follows: Does the relationship between these two variables seem to be direct or inverse? Does this accord with […]

 

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The Kramer Corporation’s marketing manager calculates a regression, where the quantity demanded of the firm’s product (designated as “C1”) is the dependent variable and the price of the product (designated as “C2”) and consumers’ disposable income (designated as “C3”) are independent variables. The Minitab printout for this regression follows What is the intercept of the […]

 

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Steve once worked as a regional sales director for a large health insurance company called Blue Star Health. Blue Star Health was once quite successful but had become complacent over the past five years. Competitors gained market share using aggressive marketing and sales tactics, and Blue Star was selling antiquated products and using inefficient processes […]

 

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Railroad executives must understand how the costs incurred in a freight yard are related to the output of the yard. The two most important services performed by a yard are switching and delivery, and it seems reasonable to use the number of cuts switched and the number of cars delivered during a particular period as […]

 

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