Final answer:
The statement is false because computer components can retain charge after being unplugged. To ensure safety, one should wait for the internal capacitors to discharge before working inside a computer case. Testing another appliance can help determine if an electrical outlet is faulty.
Step-by-step explanation:
The statement, 'Immediately after you unplug the computer from the power outlet, you're safe to begin working inside the case,' is false. Even after a computer is unplugged, components such as the power supply can retain charge and can be dangerous. It is important to wait for the internal capacitors to discharge before starting to work on a computer's internal components. Testing a hypothesis about an electrical outlet can be done by plugging in another appliance, like a coffeemaker, to see if it works. If the coffeemaker also doesn't work when plugged into the same outlet, the original hypothesis that there is something wrong with the electrical outlet is likely correct. Conversely, if the coffeemaker does work, then the original hypothesis is likely incorrect and the issue may be with the toaster itself, for example, it wasn't turned on. Therefore, verifying the condition of the electrical outlet is an essential step in troubleshooting.