Question

A given distribution has a mean of 50. a score of 43 has a corresponding z-score of l.94. what is the standard deviation (to the nearest hundredth)?

Answer 1

z= x-u / sd

u= mean = 50
x = score = 43
z= 1.94

so
1.94 = 43-50 /sd
1.94 = -7sd
so 1 sd = 1.94/ -7 = -3.6