Relative Frequency
0.02
20,000-25,000
0.09
25,000-30,000 0.19
30,000-40,000 0.26
40,000-50,000 0.18
50,000-75,000 0.17
75,000-99,999 0.02
100,000+
0.01
Part (b)
Salary ($)
<20,000
Part (a)
What proportion of the survey answered "not sure"? (Enter your answer to two decimal places.)