(20.24) Twenty-five adult citizens of the U.S. were asked to estimate the averag
ID: 3131298 • Letter: #
Question
(20.24) Twenty-five adult citizens of the U.S. were asked to estimate the average income of all U.S. households. The mean estimate was = $45,000 and s = $15,000. (Note: the actual average household income at the time of the study was about $68,000.) Assume the 25 adults in the study can be considered an SRS from the population of all adult citizens of the U.S. Which of the following would cause the most worry about the validity of a 95% confidence interval that you calculate using this information?
A)A stemplot of the data shows a mild right-skew. B)You do not know the population standard deviation . C)You notice that there is a clear outlier in the data.Explanation / Answer
Answer
C)You notice that there is a clear outlier in the data
A is not the answer because you dont have any atemplot
B you dont nedd population standad desviation because you have all the data for the sample
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