When aircraft are queuing up to land they fly around in some kind of well defined, circular pattern to avoid collisions. There are rules about minimum separation between planes so only so many can fit in the pattern before it's full.
The quote comes from the Movie "Top Gun" after the Tom Cruise character requests permission to fly by the [airfield's control] tower. The callsign for his aircraft was "Ghostrider" so the quote translates to:
No, you may not fly your aircraft past the control tower because there are many other aircraft nearby waiting to land.
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IN statistics yes there is a negative mean. Mean is the average of multiple numbers. Negative is opposite of positive.
Yes, the mean can be negative if the numbers being averaged are negative. For example, if you are averaging temperatures and all of the temperatures are below zero, your average temperature will be a negative number.
It means that it is an incorrect statement. Vectors can be negative.
Of course it is! If the mean of a set of data is negative, then the coefficient of variation will be negative.
It can have either a negative or positive trend