DATABASE FUNDAMENTALS
DATA WAREHOUSING AND DATA MINING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Mean
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Median
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Mode
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All of the above
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Detailed explanation-1: -4) Which of the following measures of central tendency will always change if a single value in the data changes? The mean of the dataset would always change if we change any value of the data set.
Detailed explanation-2: -An important property of the mean is that it includes every value in your data set as part of the calculation. In addition, the mean is the only measure of central tendency where the sum of the deviations of each value from the mean is always zero.
Detailed explanation-3: -Hence, out of the three measures of central tendency, only mode can have more than one value.
Detailed explanation-4: -The mean is the most frequently used measure of central tendency because it uses all values in the data set to give you an average.
Detailed explanation-5: -Changing the value of a score in a distribution will always change the value of the mean.