For a particular dataset, you believe that the bell curve is a good fit for the data. You have estimated that the mean is 16 and the variance is 9. To check whether the bell curve is a good fit, you decide to use the “Empirical Rule” as described in the course video. Calculate the interval for which 95.45% of your observations should lie.

1. The interval would start at 10 and end at 22.
2. The interval would start at 7 and end at 25.
3. The interval would start at -2 and end at 34.
4. We need more information in order to calculate this interval.