Item 1
Calculate the z-score, assuming:
X = 10
mean = 50
stdev = 10
z score _____
Item 2
Calculate the z-score, assuming:
X = 80
mean = 50
stdev = 15
X – mean _____
z score _____
Item 3
Calculate the z-score, assuming:
X = 112
mean = 100
stdev = 15
X – mean _____
z score _____
Item 4
Calculate the raw score, assuming:
z = 1.5
mean = 115
stdev = 10
z * stdev _____
X _____
Item 5
Calculate the raw score, assuming:
z = -1.37
mean = 100
stdev = 20
z * stdev _____
X _____
Item 6
Calculate the raw score, assuming:
z = -1.37
mean = 100
stdev = 20
X _____
ANSWERS
Item 1
Calculate the z-score, assuming:
X = 10
mean = 50
stdev = 10
X – mean = – 40
z score = – 4.
Item 2
Calculate the z-score, assuming:
X = 80
mean = 50
stdev = 15
X – mean = 30
z score = 2.0
Item 3
Calculate the z-score, assuming:
X = 112
mean = 100
stdev = 15
X – mean = 12
z score = .80
Item 4
Calculate the raw score, assuming:
z = 1.5
mean = 115
stdev = 10
z * stdev = 15
X = 130
Item 5
Calculate the raw score, assuming:
z = -1.37
mean = 100
stdev = 20
z * stdev = 27.4
X = 72.6
Item 6
Calculate the raw score, assuming:
z = 2.54
mean = 80
stdev = 20
X = 130.8
2.54*20 = 50.8
50.8 + 80 = 130.8
