1. Calculate the mean and standard deviation of the following sample:
-1, 4, 5, 0.
2. The following is the distribution of ages of students in a graduate course:
![440_Calculate the mean and standard deviation.png](https://secure.tutorsglobe.com/CMSImages/440_Calculate the mean and standard deviation.png)
(a) Construct a bar chart of the data.
(b) Calculate the mean and standard deviation of the data