Mean, Variance, and Standard Deviation — Engineering Board Exam Practice Questions

6 free engineering board exam reviewer questions on Mean, Variance, and Standard Deviation (Combinatorics and Probability), each with the correct answer and a worked solution.

1. Find the population standard deviation of the first 10 natural numbers 1, 2, , 10.
2. A frequency distribution has class marks 10, 20, 30, 40 with frequencies 5, 8, 12, 5. Find the mean.
3. Find the sample variance of 3, 7, 8, 10, 12.
4. Find the population standard deviation of 2, 4, 4, 4, 5, 5, 7, 9.
5. Find the median of 7, 3, 12, 9, 15, 4.
6. Find the mean of the data 10, 14, 18, 22, 36.