Evelyn Claims That Out Of The 1000 Surveys That She Sent By Mail To Random Addresses Around The City Only 121 Were Retu 1 (50.7 KiB) Viewed 74 times
Evelyn claims that out of the 1000 surveys that she sent by mail to random addresses around the city, only 121 were returned. What is an appropriate comment regarding this response rate ? O The sample could be biased because there was no monetary incentive to respond O No concern because more than 10% have responded O The surveys were sent to random addresses so the sample can be considered representative O There is potential bias if the subjects responding have a systemic characteristic (relevant to the study) not shared by non-respondents
A Kaplan Meier Curve shows O The proportion of a cohort who have not survived at a point in time O The Hazard Ratio The proportion of a cohort still event-free at point in time O The time-to-event for every participant
Join a community of subject matter experts. Register for FREE to view solutions, replies, and use search function. Request answer by replying!