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 0 to 1600 Use the TI-83/84 and the estimated standard deviation to determine the sample size corresponding to a 95% confidence level and a margin of error of 100 points. A confidence level of 95% requires a minimum sample size of _____. (Round UP to the nearest integer.)
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First, we need to estimate the standard deviation using the range rule of thumb. The range rule of thumb states that the standard deviation is approximately equal to the range divided by 4. In this case, the range is 1600 (since the scores range from 0 to Show moreā¦
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