Question

6 of 10 (5 In 1965, researchers used random digit dialing to call 1400 people and ask what obstacles kept them from attending sporting events. sampling was used, since the 1400 phone numbers that were easiest to reach were selected. OA. C O B. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1400 phone numbers had an equal chance of O C. Systematic sampling was used, since phone numbers were selected from a list using a fixed interval between phone numbers. OD. Cluster sampling was used, since the phone numbers were divided into groups, several groups were selected, and each number in those groups was called Click to select your answer(s). « Previous Next Sho 5:35 P

the last pic what potential source of bais were present. if any? select all that apply

Answer 1