SCORE THE Z- SCORE

It is a statistical tool which determines whether there is any dependence or correlation among two or more variables. Z score is closely related to the p- value which is the probability that the null hypothesis will be rejected. The Z scores can be represented in a graph of standard normal distribution that is the standard deviation against probability. When the Z score is very high or very low, this is often associated with very small p- values; they are normally situated in the tails of the distribution curve

An illustration on the application of z-score can be explained in a research involving the evaluation of teacher effectiveness and student performance. The z score will indicate whether teacher's effectiveness affects student performance. The students can perform very well or poorly depending on the effectiveness of the teacher. Educators can...

This can be translated to mean poor teaching strategies will mean poor performance by the students. When the Z- score is positive it means that the teaching strategy has no effect on the performance of the student. That is to say a change in the teaching strategy will not affect…