The piezometer gauge pressures at a critical location on a penstock model were measured under maximum flow conditions as follows (ordered data in inches of mercury).
![1378_critical location on a penstock model.png](https://secure.tutorsglobe.com/CMSImages/1378_critical location on a penstock model.png)
Compute sample mean, variance, and skewness coefficient. Use a histogram with the mean at an interval boundary to answer the question: did values above and below the mean occur with equal frequency? Were very low readings as common as very high readings?