Question

Understanding the Z-score

Solve the following problem.

1. X = 50, s = 5, X(mean) = 40

2. X = 40, o = 8, u(mean) = 52

3. X = 36, s = 6, X(mean) = 28

Answer 1

1) $z=\frac{50-40}{5}=2.$

2) $z=\frac{40-52}{8}=-1.5.$

3) $z=\frac{36-28}{6}=1.33.$