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A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to make a rough estimate of the standard deviation of those scores. Possible scores range from 800 to 2000.
Use technology and the estimated standard deviation to determine the sample size corresponding to a 99% confidence level and a margin of error of 100 points.
What isn't quite right with this exercise?
a. The range rule of thumb estimate for the standard deviation is
b. A confidence level of 99% requires a mimimum sample size of
What isn't quite right with this exercise?
