Data Analysis Statistics Mock Tests

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

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

The mean of 5 numbers is 20. If one number is removed, the mean becomes 18. What is the value of the removed number?

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?

The range of a data set is 24. The maximum value is 50. What is the minimum value?

The mean of a data set is 50 and the standard deviation is 10. If every value in the data set is multiplied by 3 and then 5 is added to each result, what is the standard deviation of the new data set?

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?

The scores of 5 students on a test are: 12, 15, x, 20, 22. If the median score is 18, what is the value of x?