For the measurement described below, identify at least one likely source of random errors, and also identify at least one likely source of systematic errors.
Speeds of cars are recorded by a police officer who uses a radar gun.
Identify a likely source of random errors.
A.
A new technology is developed that makes cars appear to be going slower than they really are to radar guns, and everybody uses it to avoid speeding tickets.
B.
The police officer makes honest mistakes when he records the speeds of passing cars in his log.
C.
The officer is given a quota of speeding tickets and in order to meet the quota he must record some car speeds as higher than the radar gun actually displayed.
D.
The police officer uses the radar gun to measure the speed of cars in oncoming traffic while he is driving, but the gun is calibrated for a stationary police car.
Identify a likely source of systematic errors.
A.
A bird flies in front of the radar gun while the officer is taking a reading, and the gun measures the bird's speed, not the target car's speed.
B.
The police officer spills coffee on the radar gun causing it to display numbers that are unrelated to the speed of the cars at which it is pointed.
C.
Due to low batteries, the display on the radar gun is difficult to read and the police officer misreads the measurements that are displayed.
D.
The police officer tests his radar gun, after giving out s