Update app.py

app.py

@@ -275,4 +275,15 @@ st.latex(r'''
 st.subheader("Relative Variance")
 st.latex(r'''
     \text{Relative Var} = \frac{\text{Var}}{\bar{x}} \times 100
+''')
+st.markdown(''':orange[**Standard Deviation**] is one of the measure to find the disperssion.It is one of the best measure to find the disperssion.It over comes the 
+disadvantage occured in varience by square rooting it.
+''')
+st.subheader("Absolute Standard Deviation")
+st.latex(r'''
+    \sigma = \sqrt{\frac{1}{N} \sum_{i=1}^{N} (x_i - \bar{x})^2}
+''')
+st.subheader("Relative Standard Deviation")
+st.latex(r'''
+    \text{Relative SD} = \frac{\sigma}{\bar{x}}
 ''')