METHODS OF DATA ANALYSIS
MEASURES OF DISPERSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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increase
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decrease
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stay the same
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both increase and decrease
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Detailed explanation-1: -No matter what value we add to the set, the mean, median, and mode will shift by that amount but the range and the IQR will remain the same. The same will be true if we subtract an amount from every data point in the set: the mean, median, and mode will shift to the left but the range and IQR will stay the same.
Detailed explanation-2: -The median of a data set is the middle value when the values are written in numerical order. If a data set has an even number of values, the median is the mean of the two middle values.
Detailed explanation-3: -The median of a set of numbers is the middle number in the set (after the numbers have been arranged from least to greatest)–or, if there are an even number of data, the median is the average of the middle two numbers.