Executives at Bank of America knew (or reasonably should have known) that their own projection for losses at Merrill Lynch was not a valid forecast.
Obtain a valid passport when planning a vacation to France.
A predictive method for dengue fever would forecast when and where an outbreak will occur before its emergence.
Agnosticism isn't a valid opt-out when dealing with Islamist militias.
This will only be possible if you provided a valid email address when registering.
This can be a valid way of forecasting the weather when it is in a steady state, such as during the summer season in the tropics.
It is clear that those studies did not intend to offer quantitatively valid forecasts.
A valid concern on a day when the temperature was past 90 degrees.
A valid student ID is required when buying tickets and riding the train.
Hatred is a valid emotion, an appropriate response, when directed at the truly evil.
Thus, the HEFST model is a valid and promising alternative for forecasting regional electricity loads.
