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Name _____________________________
Date ___________________
Statistics
Complete.

1.   Anthony used the method of Archimedes to determine the volume of some twigs he was using in an experiment. The class was comparing the densities of different kinds of wood. He measured the volume of 7 twigs and found the average volume was 3 ml. Before he completed the calculations, he discarded one measurement because he thought the twig was the wrong species. After discarding the twig he obtained, a new average volume of 2.5 ml. What must have been the volume of the twig he discarded?
2.   * This is a pre-made sheet.
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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?

 

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