Anyone able to help me with this question relating to mean, standard deviation and z-score.?

Question

The length of time of full-length movies is approximately normally distributed with a mean of 1.9 hours and standard deviation of 0.3 hours. Based on this scenario, explain what a Z-Score is

Answer 1

The z-score is the number of standard deviations above or below the mean.  For instance a movie whose length is 2.2 hours corresponds to z = +1, a movie whose length is 1.6 hours corresponds to z = -1, a movie whose length is 2.5 hours corresponds to z = +2.

A formula is z = (x - mean)/(standard deviation)

where "x" is the datum to which you want to assign a z-score.