A variable has a meanof 144 and a standard deviationof 25. Five observations of this variable have a mean of 156 and a sample standard deviation of 16. Determine the observed value of the
a. standardized version of x (x with dash over, see attachment)
b. studentized version of x (x with a dash over, see attachment).
The solution finds a standardized and studentized version of x with a variable mean and standard deviation given.