Caffeine content in a 5-ounce cup of brewed coffee ranges from 60 to 180 mg, depending on

brew  time, coffee bean type, and grind. (a) use the midrange as a measure of center. (b) use

the empirical rule to estimate the standard deviation. (c) why is the assumption of a normal,

bell-shaped distribution important in making these estimates? (d) why might caffeine content of

coffee not be normal?

An ecosystem is shown in the illustration. assume that human activities have led to a decrease in the number of eagles. a virus attack on rabbits has led to a decrease in their population in the ecosystem. which two sentences describe likely effects on the ecosystem? 1. there’s an increase in the number of snakes and insects and a decrease in the number of frogs. 2. there’s an increase in the number of snakes and insects, and the storks face increased competition for food. 3. there’s an increase in the number of storks and a decrease in the number of snakes and insects. 4. there’s an increase in the number of frogs and a decrease in the number of storks and insects. 5. there’s a decrease in the number of snakes, insects, and frogs.