WorksheetsZ-Scores and Standard Normal Distribution
Total questions: 12
Worksheet time: 1hrs 20mins
Brian scored an 80% on a Chemistry Exam. The average on the exam was a 68%, with a standard deviation of 5%. What is Brian's z-score?
2.4
-2.4
1.1
-1.1
IQ tests have a mean of 100 and SD of 16. Einstein's IQ was 160. What is the z-score of his IQ?
1.75
3.75
0.75
2.75
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%
If waist sizes are normally distributed, determine the z-score of a teenage male with a 33 inch waist.
About what percent of the products last between 12 and 15 days?
Pat and Tom took a test with mean 80 and SD 9. Pat scored a 76; Tom scored a 94. Find the percent of people between their scores.
68.78%
63.29%
61.06%
34.25%
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%
Test has a mean of 40, standard deviation of 10. What is the percent of people with a score below 37?
52.97%
31.53%
48.99%
38.21%
A test has a mean of 40 and a standard deviation of 10. What is the percent of people that scored between 30 and 40?
68%
34%
13.6%
100%
