A telephone executive instructs an associate to contact 104 customers using their service to obtain their opinions in regard to an idea for a new pricing package. The associate notes the number of customers whose names begin with A and uses a random number table to pick four of these names. She then proceeds to use the same procedure for each letter of the alphabet and combines the 4 × 26 = 104 results into a group to be contacted. Which of the following is a correct conclusion?
(A)Her procedure makes use of chance. (B)Her procedure results in a simple random sample. (C)Each customer has an equal probability of being included in the survey. (D)Her procedure introduces bias through sampling error.
A