Louis works for the Oakland County Police Department. He is assigned with the task of sorting through massive amounts of data with statistical and mathematical programs in an effort to detect fraud and crime. Louis should use to complete his task most efficiently.

Data mining.

Explanation:

A person of his caliber is advised to sort for data mining. Data mining programs are known for their analysis of relationships and patterns which are seen in data based, especially on what users on the on the interface require. Companies are known to use data mining software to create different forms and classes of information. These may include;

R software environ, orange data mining(Primarily for visualization and other analysis too), Weka data mining tool(This collects algorithms when at a task of data mining).

There are also other business intelligence that aid data mining proficiency too.

the median of the data is 4.

step-by-step explanation:

the median means the middle number of a given number.

to decide which one is the median, arrange in ascending or descending order. but sometimes, you may find two(2) number in the middle, but it's easy, just add them together and divide by 2.

so,   determine the median of the data. 2, 3, 3, 4, 5, 7, 9

it is already arranged, count 3 times forward and 3 backward and the one left is your answer.

2,3,3,4,5,7,9

our answer is 4.

hope this !

probably 3 since archeologists and historians don’t understand there writing.