Police codes were developed in order to keep police communication secret from the public

Police codes were developed to keep police communication secret from the public and to reduce the time the message was issued.

Explanation:

The police codes were created in 1909 by the British and internationally adopted by the military. It is used as a form of standardized communication that serves to confuse and hamper the interpretation of malicious people who are hearing. In addition, it serves to streamline the content of the message among the police.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;

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