Question

4.For a population with a mean of μ = 40 and σ = 11, find the z–score for each of the following X values. (Note: You probably will need to use a formula and a calculator to find these values)

X = 45: z =_____ X = 52: z =_____X = 41: z =_____

X = 30: z =_____X = 25: z =_____X = 38: z =_____

5. For a population with a mean of μ = 100 and a standard deviation of σ = 20,

a.Find the z-score for each of the following X values.

X = 108: z =_____ X = 115: z =_____ X = 130: z =_____

X = 90: z =_____X = 88: z =_____X = 95: z =_____

b. Find the score (X value) that corresponds to each of the following z-scores.

z = -0.40: X=______z = -0.50: X=______z = 1.80: X=______

z = 0.75: X=______z = 1.50: X=______z = -1.25: X=______

Answer 1