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Exhibit 4-7
Golden-rumped elephant shrews have long flexible snouts, used to overturn leaf-litter where they find their food: millipedes, insects and spiders. These animals are among the approximately 10% of mammalian species that mate for life. Just why these mammals are monogamous is poorly understood, and one theory is that a monogamous male would have to defend less territory from intrusion by other males. The home range of an animal, i.e. that area over which they typically travel, is a function of diet and energy consumption of the animal. The energy consumption is, in turn, typically a function of the animal's size. In a recent study, investigators reasoned that if monogamy was related in some way to the home territory, this should be detectable by comparing these animals to other insect-eating mammals. Data were gathered on 27 similar species and are presented in the table below. After fitting a straight line model,
, significant curvature was detected in the residual plot, and two transformed models were chosen for further analysis: the power and exponential models. The computer output for these transformed models and the residual plots follow.
Residual Plot and Statistical Analysis - exponential model
Log Home Range vs. Weight
Log(H) = 0.250 + 0.000231 W Residual Plot and Statistical Analysis - Power model
Log Home Range vs. Log Weight
Log(H) = −1.601 + 0.893Log(W)
-Refer to Exhibit 4-7.
For the exponential model, calculate the predicted log (Home Range) for a Weight of 1000g.
Maintenance Department
A functional area within an organization responsible for the upkeep of physical assets, machinery, and buildings.
Support Department Costs
Expenses that are not directly tied to the production of goods or services but are necessary for supporting the operations of a business, like IT or HR departments.
Direct Method
A way of presenting the cash flow statement where major classes of gross cash receipts and payments are disclosed, offering a more straightforward view of cash flow from operating activities.
Cafeteria Department Costs
Expenses associated with operating a company's cafeteria, including food, labor, and overhead costs.
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