typo

avarage -> average

random_signals/correlation_functions.ipynb

@@ -26,7 +26,7 @@
    "source": [
     "### Definition\n",
     "\n",
-    "For a continuous-amplitude, real-valued random signal $x[k]$ the ACF is defined by the [second-order ensemble avarage](ensemble_averages.ipynb#Second-Order-Ensemble-Averages) of the signal at two different time-instants $k_1$ and $k_2$\n",
+    "For a continuous-amplitude, real-valued random signal $x[k]$ the ACF is defined by the [second-order ensemble average](ensemble_averages.ipynb#Second-Order-Ensemble-Averages) of the signal at two different time-instants $k_1$ and $k_2$\n",
     "\n",
     "\\begin{equation}\n",
     "\\varphi_{xx}[k_1, k_2] = E\\{ x[k_1] \\cdot x[k_2] \\}.\n",
@@ -286,7 +286,7 @@
    "source": [
     "### Definition\n",
     "\n",
-    "For two continuous-amplitude, real-valued random signals $x[k]$ and $y[k]$ the CCF is defined by the [second-order ensemble avarage](ensemble_averages.ipynb#Second-Order-Ensemble-Averages) at two different time-instants $k_x$ and $k_y$\n",
+    "For two continuous-amplitude, real-valued random signals $x[k]$ and $y[k]$ the CCF is defined by the [second-order ensemble average](ensemble_averages.ipynb#Second-Order-Ensemble-Averages) at two different time-instants $k_x$ and $k_y$\n",
     "\n",
     "\\begin{equation}\n",
     "\\varphi_{xy}[k_x, k_y] = E\\{ x[k_x] \\cdot y[k_y] \\}.\n",