The Following Data Shows the Number of Students Enrolled in Various

Essay

The following data shows the number of students enrolled in various professors' statistics classes. $$\begin{array} { l l } \text { Professor } & \text { Enrollment } \\\text { A } & 256 \\\text { B } & 167 \\\text { C } & 159 \\\text { D } & 164 \\\text { E } & 170 \\\text { F } & 156\end{array}$$ For the above sample, compute the following measures.
a.
The variance
b.
The standard deviation
c.
If we consider professor A's enrollment as an outlier, compute the variance and the standard deviations, excluding Professor A's class. (Round to two decimal places.)