Data Analysis Statistics Mock Tests

A company reported the following annual revenues (in millions of dollars): Year 1 = 50, Year 2 = 65, Year 3 = 78, Year 4 = 90, Year 5 = 102. What is the average annual revenue over these 5 years?

What is the median of the data set: 3, 7, 8, 5, 12, 14, 23, 15, 6, 11?

A data set has a mean of 20 and a standard deviation of 4. If each value in the data set is multiplied by 3, what is the standard deviation of the new data set?

What is the median of the data set: 12, 15, 18, 20, 22, 25, 28?

The standard deviation of a data set is 0. What does this imply?

The median of the data set 3, 7, 8, 12, 15, x, 20 is 10. What is the value of x?

What is the range of the data set: 15, 22, 8, 30, 12, 25, 5?

The standard deviation of the data set {2, 4, 6, 8, 10} is closest to: