13 - 5 = 8 (eight classical music discs were bought.)
Answer:
b.
but i am not sure
Explanation:
The purpose of hypothesis testing is to test whether the null hypothesis (there is no difference, no effect) can be rejected or approved. If the null hypothesis is rejected, then the research hypothesis can be accepted.
<span>When a bureaucratic head leaves his/her post, someone previously beneath that person must be elevated to that job to preserve the bureaucratic structure.
In a bureaucracy, assignments flow downward and accountability flows upward - in theory. However, in reality, the top levels of a bureaucracy often have the power and the motivation to redefine "accountability" when convenient.</span>
