STATISTICAL TECHNIQUES AND TOOLS
MEASURES OF CENTER AND SPREAD
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An outlier is a value in a data set that is much greater or much less than most of the other values in the data set.
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False
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True
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Either A or B
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None of the above
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Explanation:
Detailed explanation-1: -Definition of outliers. An outlier is an observation that lies an abnormal distance from other values in a random sample from a population.
Detailed explanation-2: -An outlier is defined as being any point of data that lies over 1.5 IQRs below the first quartile (Q1) or above the third quartile (Q3)in a data set.
Detailed explanation-3: -An outlier is a value in a data set that is very different from the other values. That is, outliers are values unusually far from the middle. In most cases, outliers have influence on mean, but not on the median, or mode . Therefore, the outliers are important in their effect on the mean.
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