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WorksheetsZ-scores
Total questions: 16
Worksheet time: 1hrs 20mins
What is the formula to find the z-score for population?
z=X-M
z=σ-M/μ
z/M=μ
z=X-μ/σ
Find the Z-score.
Mean = 22
Standard Deviation: 3.1
x = 29
2.26
16.45
-2.26
1.26
Find the Z-score.
Mean = 21
Standard Deviation: 1.3
x = 22
0.77
5.33
1.07
1.26
What is the probability that a score is under (left of) .73?
.7357
.7673
.7389
.7967
What is the probability that a score is under (left of) 1.73?
.9484
.9664
.9573
.9582
What is the probability that a score is under (left of) 2.37?
.9911
.9913
.9916
.9936
What is the probability that a score is under (left of) -.37?
.6443
.3974
.3557
.3156
What is the probability that a score is under (left of) -1.37?
.0853
.9147
.8997
.1003
What is the probability that a score is above (right of) 2.37?
.0116
.0089
.0068
.0051
What is the probability that a score is above (right of) -.64?
.2643
.7357
.7389
.2611
What is the z-score that corresponds to 80.23% of the data to the left?
.86
.85
.83
.80
What is the z-score that corresponds to 95.73% of the data to the left?
1.52
1.62
1.72
1.82
What is the probability that the absolute value of z is less than .97?
.6680
.6156
.6212
.8340
What is the probability that a score will fall between 1.12 and 1.94 standard deviations?
.0905
.1052
.0850
.0672
What is the probability that a score will fall between 2.10 and 3.09 standard deviations?
.0179
.0010
.016
.0169
Find the value for
P(Z < -0.386)
0.3498
0.3520
0.3501
0.6502
