Consider the following frequency distribution:
Class Frequency
10 up to 20 12
20 up to 30 15
30 up to 40 25
40 up to 50 4
a. Construct a relative frequency distribution. (Round your answers to 3 decimal places.)
Class Relative Frequency
10 up to 20 ______
20 up to 30 ______
30 up to 40 ______
40 up to 50 ______
Total _________