Using hypothetico-deductive reasoning is following a scientific process of forming various hypotheses about a topic, choosing one of these hypotheses to test, making predictions based on the chosen hypothesis, testing the correctness of the hypothesis through experimentation and observation, and then concluding whether the hypothesis is confirmed. The beginning of the process involves looking for a new problem that hasn't yet been explained by others.
Hypothetico-deductive reasoning can be used to solve problems ion such fields as chemistry and biology. When making predictions, the experimenter deduces what could result from observation or experimentation.
In addition to being used in science, this type of reasoning can be helpful for everyday life problems. For example, a person having problems with a music player not turning on may hypothesize that a battery replacement is needed and that the player will turn on after the battery has been replaced. After the person replaced the battery and the player switches on, the experimenter can conclude that his or her hypothesis was correct.