Piles are commonly used in foundations of civil work structures. Test piles were driven and used to measure pile strength at a selected site. The following strength data (in kips) were collected:

8829, 10236, 5101, 9144, 7790, 9327, 8470, 10570, 10186, 9305, 10746, 9069, 11436, 10044, 10281, 12311, 10639, 10215, 8723, and 8877. Plot the histogram and frequency diagrams for pile strength.