Tire pressure gauge of a vehicle; warning when the pressure decreases according to the production standard of the tires

It serves. When the tire pressure decreases, the warning indicator turns yellow with a probability of 97%.

In some cases, even if the tire pressure does not decrease, the warning indicator is yellow with a 5% probability

Burns. If the tire pressure of the produced vehicles is really low, it is 9%; tire pressure

When the indicator lights yellow, what is the probability that the tire pressure is really low?