3. 
Natalie collected data on earthworm crawl speed. She measured the rate of travel of the same worm 20 times. The range of speeds was 12 cm per minute. If the lowest speed was 3.7 cm per minute what was the highest speed she measured?


4. 
During a root enzyme experiment, Amber determined the dry weight of mustard roots so she could make some calculations. These were pretty small mustard plants so she had to use a good balance to get the data. She measured one set (A) of roots and obtained masses of 0.08, 0.1, 0.05, and 0.05 grams. Another set (B) had masses of 0.1, 0.04, 0.07, and 0.09 grams. Which set had the greatest average mass?

