WorksheetsNormal Distribution and Z Scores
Total questions: 10
Worksheet time: 10mins
Find the z-score for 258 given a mean of 273 and a standard deviation of 5.
3
-2
2
-3
Find the z-score for 62 given a mean of 30 and a standard deviation of 20.
1.6
-1.6
11.6
-11.6
Find the area under the standard normal curve that lies to the left of z=2.1.
1.79%
-1.79%
98.21%
0.98%
Find the area under the standard normal curve that lies to the right of z=-0.67.
63.42%
74.86%
25.14%
50%
Find the area under the standard normal curve that lies between z=-0.5 and z=1.5.
62.46%
72.47%
5.40%
62.47%
What percentage of scores falls within 3 standard deviations of the mean?
68%
34%
99.7%
95%
Find the z-score with 20% of observations falling above it.
z=-0.84
z=1.84
z=-1.84
z=0.84
A 5th grader takes a test (mean=125, SD=15) and scores a 148. What is the child's percentile rank?
93%
68%
7%
99.7%
Mean=11, SD=30. Find the raw score (X) for z=-1.5
35
45
55
65
Test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored above 62?
1.39%
45.34%
98.41%
22.34%
