a factory makes parts for laptop computers, including screws. the screws are required to have the right length. the length of the screws obey a normal distribution with mean u=4.25 millimeters and standard deviation o=0.022 millimeters

A technician randomly selects another screw and finds the z-score of its length to be -2.7. which one of the following would be a valid interpretation of this z-score?

1 the screw is unusually short

2 the screw is unusually long

3 the screw is neither unusually short nor unusually long

4 more information is needed before any valid conclusion can be drawn