Scores on a Biology test are normally distributed with a mean score of 72 and standard

deviation of 9. Brian scores a 67 on the test. Calculate Brian's z-score?

Researchers found a fertilizer treatment to have a mean plant height of 76 in. and a standard

deviation of 3 in. Find the height of a plant treated with this fertilizer that has a z-score of 0.25.

Round to the nearest tenth?

Suppose scores on a standardized test taken by future doctors are normally distributed with a

mean of 10.5 and a standard deviation of 2.2. Approximately 70% of the future doctors scored

less than what score?

The weights of bags of corn produced at a factory are normally distributed with a mean of 28 oz

and a standard deviation of 2 oz. Consider a shipment of 800 bags of corn.

How many of the bags will weigh 26.5 oz or less?