### Statistics 9.16, 9.18, 9.20, 9.22, 9.24: standard deviation, standard error

See attached file. 9.16 We use formulas to describe calculations. Find the error in symbolic notation in each of the following formulas. Explain why it is incorrect and provide the correct symbolic notation. a. z = (X - M) σ b. X = z(σ) - µm c. σm = ___σ__