Example on sampling distribution

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1. A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true. The respondents were more than 1,000 Americans who have visited France more than once for pleasure over the past two years. The results of this study are probably

A. very accurate given the large sample size.
B. very inaccurate since the sample is only a small fraction of all Americans who have visited France.
C. biased, overstating the extent to which the old stereotypes weren't true.

2. In order to assess the opinion of students at the University of Montana on campus snow removal, a reporter for the student newspaper interviews the first 12 students he meets who are willing to express their opinion. In this case, the population is

A. all students at universities receiving substantial snow.
B. the 12 students interviewed.
C. all students at the University of Montana.

3. Suppose you are going to roll a die 60 times and record , the proportion of times that a 1 or a 2 is showing. The sampling distribution of should be centered about

A. 1/6.
B. 1/3.
C. 20.

Reference no: EM137684

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