a normal population has a mean of 12.2 and a standard deviation of 2.5. a. compute the z value associated with 14.3. (round your answer to 2 decimal places.) b. what proportion of the population is between 12.2 and 14.3? (round z-score computation to 2 decimal places and your final answer to 4 decimal places.) c. what proportion of the population is less than 10.0? (round z-score computation to 2 decimal places and your final answer to 4 decimal places.)
