Added module example

modules-examples/stats.js

@@ -0,0 +1,28 @@
+export function average(lst){
+    if(lst.length < 1){
+        return NaN;
+    }
+    let sum = 0;
+    let n = 0;
+    for(const e of lst){
+        sum += e;
+        n += 1;
+    }
+    return sum / n;
+}
+
+
+export function std(lst){
+    if(lst.length < 1){
+        return NaN;
+    }
+    let sum = 0;
+    let sum2 = 0;
+    let n = 0;
+    for(const e of lst){
+        sum += e;
+        sum2 += e * e;
+        n += 1;
+    }
+    return Math.sqrt( sum2 / n - Math.pow(sum / n, 2));
+}