1) After 3 points have been added to every score in a sample, the mean is found to be M= 83 and the standard deviation is s = 8. What were the values for the mean and the standard deviation for the original sample?
2) A population has a mean of μ= 30 and a standard deviation of σ = 5. If 5 points were added to every score in the population, what would be the new values for the mean and the standard deviation?
3) After every score in a sample has been multiplied by 4, the mean is found to be M = 48 and the standard deviation iss= 12. What were the values for the mean and the standard deviation for the original sample?