Economics diploma students took part for an M.C.Q test which is worth 20 marks. The results are presented below:

12, 15, 12, 4, 16, 16, 12, 12, 15, 4, 12, 10, 15

Based on the above raw data, you want to summarise your data in terms of measures of central tendency, quartiles and dispersion. By showing all your workings (where applicable), calculate:

Mode.

Median.

Mean to 2 decimal places.

Lower quartile.

Upper quartile.

Interquartile range.

Range.

Mean Deviation

Note: You need to show all workings. Failure to do so will result in loss of marks.