Statistics Practice: Standard Scores and Back-Calculations

Statistics Practice: Standard Scores and Back-Calculations

Choose one exact numerical answer in the unit requested. Fractions such as 3/2 mean an exact value; no rounding unless requested. All 20 questions appear in random order. Practice target: 16/20. These are focused mathematics exercises, not a complete examination.
1 of 20
A score has z = -3, mean 50 and standard deviation 3. What is the original score?