the s.d. is just a "smokescreen"
all you need is the mean and the heights
3. A researcher wanted to study the effect of low light environments on the growth of alfalfa plants, so she grew six plants and measured their heights after two weeks. She calculated a sample mean of 5.2 cm with a standard deviation of 1.1 cm. If the heights of the first five plants in her sample were 4.1 cm, 4.9 cm, 3.9 cm, 6.0 cm, and 5.6 cm, what is the height of the other plant?
I keep getting 6.7 as the unknown length when I work backwards using the mean, but am not sure how the standard deviation works into the problem...
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