add hw2

node_modules/ramda/es/mean.js

@@ -0,0 +1,26 @@
+import _curry1 from "./internal/_curry1.js";
+import sum from "./sum.js";
+/**
+ * Returns the mean of the given list of numbers.
+ *
+ * @func
+ * @memberOf R
+ * @since v0.14.0
+ * @category Math
+ * @sig [Number] -> Number
+ * @param {Array} list
+ * @return {Number}
+ * @see R.median
+ * @example
+ *
+ *      R.mean([2, 7, 9]); //=> 6
+ *      R.mean([]); //=> NaN
+ */
+
+var mean =
+/*#__PURE__*/
+_curry1(function mean(list) {
+  return sum(list) / list.length;
+});
+
+export default mean;