For the data given in the table below, Radar Gun 1 is Accurate, Radar Gun 2 is Repeatable and Radar Gun 3 is Precise. The missing value for Radar Gun 3 Car 2 should most nearly be? You may assume the true speed of all three cars is a constant and equal.
Speed of a car (mph) 

A 
B 
C 

Radar Gun 1 
Radar Gun 2 
Radar Gun 3 

Car 1 
38 
40 
37 
Car 2 
36 
40 
? 
Car 3 
40 
40 
39 
a. 
36 

b. 
40 

c. 
38 

d. 
44 
The radar gun 2 is repeatable and can not be trustworthy, the radar gun 1 is accurate and can be taken as a reference for the radar gun 3 which is precise. The values of speed obtained in radar gun 3 are almost near to the values obtained in the radar gun 1. Therefore the value of speed for car 2 in radar gun 3 will be near to the value obtained in radar gun 1 which is 36 mph.
Therefore, the correct option is (a)
the options (b), (c), and (d) are not correct because their value is differing from a large gap with respect to the radar gun 1.
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