Using a TI-84 graphing calculator, how would you calculate the probability that a z-score is less than -1.25?

• A. Use the inverse norm function with area 0.1056.
• B. Use the shade normal function with lower bound as -1.25 and upper bound as 1E99.
• C. Use the normalcdf function with lower bound as -1E99 and upper bound as -1.25.
• D. Use the normalcdf function with lower bound as 0 and upper bound as -1.25.

Answer: (C)