a. A population of N = 10 scores has a mean of m = 12. If one score with a value of X = 21 is removed from the population, then what is the value of the new population mean? b. A sample of n = 6...

a. A population of N = 10 scores has a mean of m = 12. If one score with a value of X = 21 is removed from the population, then what is the value of the new population mean?

b. A sample of n = 6 scores has a mean of M =14. After one new score is added, the new sample has a mean of M = 12. What is the value of the score that was added?