Answer:
For this answer, we use this formula:
Z = ( X - U ) / ( S / √n )
Where:
X = sample mean
U = population mean
S = population standard deviation
n = number of samples
Now, we can put the amounts into the formula:
Z = ( 56 - 50) / ( 12 / √4 )
Z = 1
So, z is 1, which means that the data point is 1 standard deviation from the mean.
