A KFF Health Tracking Pollwas conducted February 13th -18th, 2020, among a nationally representative random digit dial telephone sample of 1,207 adults ages 18 and older, living in the United States, including Alaska and Hawaii.

Adults in the sample were asked what type of health care plan they favor. 634 of those surveyed said they favored some form of Medicare-for-All, i.e.both Medicare-for-All and a public option, or only Medicare-for-All.

Is there evidence to say that a majority, i.e. more than half, of the country favors some form of Medicare-for-All plan?

What type of error might have been made?