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A researcher wants to find out how college students feel about their social security system. Which of the following unbiased methods could the researcher use?
Select all that apply.
Select one or more:
The researcher places a poll question on the main university website and allow students to vote whether or not they like the system.
The researcher sets up a booth outside of the large classroom building and ask students to fill out a survey as they pass.
the researcher randomly selects 10 classes and asks all the students in those classes to fill out an anonymous survey.
The researcher places a survey in the campus paper which students could cut out and mail to the researcher.
the researcher takes a random sample from the enrollment list of the college and surveys the selected students.
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Use the average of 2001, 2002 and 2003 as the base and determine indexes for 2005 and for the preliminary 2006 data using 100 as the base value.
a witness to a hit-and-run accident told the police that the license number contained the letters rlh followed by 3
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An old saying in golf is "you drive for show and you putt for dough." The point is that good putting is more important than long driving for shooting low scores and hence winning money.
If sample of size 10 packages is randomly chosen, and 5 percent rate holds, determine the probability that exactly 2 packages in the sample arrive late?
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