The following data represent a summary of the ratings given from diners for the service they received at a particular restaurant that opened for lunch and dinner.

Please write down how you would describe the resultant appearance of the frequency distribution curve after plotting these values.

15, 29, 23, 5, 13, 20, 29, 39, 13, 23, 40, 29, 13, 12, 56, 29, 13, 29, 15, 13, 29, 12, 13

This may be best described as a   distribution (hint: plot the data and look at the shape).