Imagine you created a variable (Xhours) for which you asked 50 people how many hours per week they study on average. Then you create a second variable by multiplying each of the values of the original variable with itself (i.e., you square them, X2 hours). Now you transform both variables into a z-score (zhours and zhours 2). You now have 4 variables in total and calculate the mean and standard deviation of all. Which statement is TRUE? A. X2 hours has a higher mean than Xhours. B. X2 hours has a higher standard deviation than Xhours. C. zhours has a mean that is equal to the mean of zhours2 . D. z2 hours has a higher standard deviation than zhours. E. All of these statements are false.