Which of the following scenarios will not result in sampling bias?
a) The regular meeting time of a new group is determined by people who come to a Monday afternoon meeting.
b) American food preferences are determined by a random sample of California residents.
c) Gas price fluctuations in a city are followed by taking a random sample of gas stations in the city each Friday for a year.
d) None of the above
2007-03-27 02:46:55 · 4 answers · asked by slow_math 1 in Science & Mathematics ➔ Mathematics
d) None of the above
a - is biased against people who cannot make it to Monday meetings
b - is biased against all states other than California
c - is biased against days of the week other than Friday
2007-03-27 02:51:08 · answer #1 · answered by Chris D 2 · 0⤊ 0⤋
Yeah, it's d) None of the above. In all of the scenarios, there's a limiting factor (monday meetings, California, Fridays) that means the results will be skewed in some way. Of course, it's very difficult to achieve a sample with absolutely no bias, but the key factor is to make the bias small enough to be effectively insignificant.
2007-03-27 02:55:18 · answer #2 · answered by Oliver 1 · 0⤊ 0⤋
none... they are biased against every other state, or day
2007-03-27 02:58:34 · answer #3 · answered by kirlia7755 3 · 0⤊ 0⤋
d all others are nor varied enough
2007-03-27 02:50:16 · answer #4 · answered by john p 2 · 1⤊ 0⤋