Question

relative frequencies and association
the conditional relative frequency table was generated using data that
compares the number of voters in the last election and whether or not they
worked on election day. fifty people who voted and 85 people who did not
vote were chosen at random and surveyed.
how many people in the survey worked on election day?
66
34
69
32

Explanation:

Step1: Calculate number of voters who worked

Number of voters who voted is \(n_{voted}=50\). The conditional relative frequency of voters who worked is \(0.64\).
Number of voters who worked \(=50\times0.64 = 32\)

Step2: Calculate number of non - voters who worked

Number of non - voters is \(n_{non - voted}=85\). The conditional relative frequency of non - voters who worked is \(0.4\).
Number of non - voters who worked \(=85\times0.4=34\)

Step3: Calculate total number of people who worked

Total number of people who worked \(=32 + 34=66\)

Answer:

66