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diff --git a/662/CH9/EX9.9/example9_9.sci b/662/CH9/EX9.9/example9_9.sci
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+            //programming Example 9.9
+//calculate the average of n numbers, 
+            //then compute the deviation of each number aboutthe average.
+
+n = 5;
+List={3, -2, 12, 4.4, 3.5};
+
+function[] = main()
+    Sum = 0;
+
+    //calculate and display the average
+    for count = 1:1:n
+        Sum=Sum+List(count);
+    end
+    avg = Sum/n;
+    printf("\nThe average is %5.2f\n\n", avg);
+
+    //Calculate and display the deviations about the average
+    for count = 1:1:n
+        d = List(count)-avg;
+        printf("i = %d        X = %5.2f        d = %5.2f\n", count, List(count), d);
+    end
+endfunction
+
+//calling main()
+funcprot(0);
+main();
+\ No newline at end of file