Question

6. What is a z-score?
Select one:
a. It is the average frequency of scores
in a sample.
b. It is a measure of central tendency in
the data.
c. It is a standardised measure of the
mean of a set of data.
. d. It is the number of standard
deviations a particular score lies above
or below the mean of the set of scores.​

Answer 1

Answer:

In statistics, the standard score is the number of standard deviations by which the value of a raw score is above or below the mean value of what is being observed or measured. Raw scores above the mean have positive standard scores, while those below the mean have negative standard scores. 

Step-by-step explanation:

Formula



=standard score=observed value=mean of the sample=standard deviation of the sample