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FCAT Grade 8 Science Assessment Practice Questions

Category - FCAT Science Assessment Grade 8

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Charlie collected data on the heights of trees in a park near his home, and found that the average height was 9.2 meters, with a standard deviation of 1.3 meters. This means that:
  1. About 65% of the trees are less than 10.5 meters in height.
  2. About 95% of the trees are less than 10.5 meters in height.
  3. Most of the trees are taller than 9.5 meters.
  4. The data was not very good, and some trees are shorter than 9.2 meters.
  5. About 10% of the trees are shorter than 9.2 meters.
Explanation
Answer: A - The 1st standard deviation covers 68.2% of trees, centered on the average. This means that 68.2% of the trees should be less than 10.5 meters in height. The standard deviation can be a measure of error, especially if you are looking to replicate a result. However, in this case, it is merely a measure of variance.
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