### Home > INT3 > Chapter 5 > Lesson 5.2.1 > Problem5-60

5-60.

At Frucht Orchards, apple trees produce an average of $840$ pounds of fruit per tree with a standard deviation of $120$ pounds. Their mango trees produce an average of $350$ pounds of fruit per tree with a standard deviation of $190$ pounds. Frucht Orchards is trying two new fertilizers. An apple tree fed Amazing Apples Fertilizer yielded $940$ pounds of fruit, while a mango tree fed Amazing Mangos Fertilizer yielded $400$ pounds of fruit. Which new fertilizer appears to be more “amazing”?

How many standard deviations above the mean is each tree?