1. The Margin of Error, E, for a 95% confidence interval formeans is: wheresis the sample standard deviation andnis the sample size.
2. Invent a quantitative variable, such as age, weight, exam score, etc. Thinking about that variable, create a small set of data (30 data values) to describe that variable. Use Excel to calculate the sample mean of your data and the sample standard deviation. If you create 30 values, the sample size is 30. Then, calculate the margin of error.