Posted by **matt** on Sunday, September 26, 2010 at 4:52pm.

13) You are told that the mean height of trees around the Physics building is 8 feet tall, with a standard deviation of 1.5 feet. Which is the most appropriate statement you can make, based on this information?

- statistics -
**matt**, Sunday, September 26, 2010 at 4:54pm
choices:

a) About 68% of the trees are between 6.5 and 9.5 feet tall

b) About 75% of the trees are between 5 and 11 feet tall

c) At least 75% of the trees are between 5 and 11 feet tall

d) At least 75% of the trees are betwwen 6.5 and 9.5 feet tall

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**PsyDAG**, Monday, September 27, 2010 at 12:42pm
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores.

- statistics -
**Anonymous**, Tuesday, October 26, 2010 at 2:52pm
There is a wooden fence around your water treatment plant that measures 6 feet tall and 95 feet long. Your supervisor has instructed you to determine how many square feet of area this fence has on both side so that you can panint it. He tells you not to count the two gates that measure 4 feet wide each because they are goning to be replaced. What is the square footage of this fence?

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