Answer:
Step-by-step explanation:
a. The frequency and percent frequency of complaints by industry is shown below:
Industry       Frequency   Percentage Frequency
Bank           26           13%
Cable           44           22%
Car             42           21%
Cell             60          30%
Collection        48          13%
b. Cell has the highest complaints (60).
c. The decreasing order of complaints goes thus: Cell (60%) , Cable (22%), Car(21%).
Both Collection and Bank, together account nearly up to 27% of the total complaints.