Type the correct answer in the box. Use numerals instead of words.
Consider this data set.
20.5 24.2 18.3
16.3 27 25.5
21 19.8 27.3
18.4 20.5 17.6
25.5 23.4 20.2
Use the data to complete this statement. Any non-integer answers should be entered as decimals, rounded to the tenths place.
The mean of the data set is ___
, and the sample proportion of numbers less than the mean is ___%.