This is no longer simple random sampling, because some combinations of 100 students have a larger selection probability than others â for instance, {3, 13, 23, ..., 993} has a 1/10 chance of selection, while {1, 2, 3, ..., 100} cannot be selected under this method.
Definition of 'weather forecast'. weather forecast. A weather forecast is a statement saying what the weather will be like the next day or for the next few days.
Weather forecasting is the application of science and technology to predict the state of the atmosphere for a future time and a given location. Human beings have attempted to predict the weather for as long as there are records. Today, weather forecasts are made by collecting quantitative data about the current state of the atmosphere and using scientific understanding of atmospheric processes to project how the atmosphere will evolve.