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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A statistician has computed some data on the ages of people when they have their first child. The data showed the ages to be skewed right. Which of the following is the best way to describe the central tendency (typical value)?
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Mean
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Median
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Mode
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Midrange
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Explanation:
Detailed explanation-1: -The mean is affected by outliers that do not influence the mean. Therefore, when the distribution of data is skewed to the left, the mean is often less than the median. When the distribution is skewed to the right, the mean is often greater than the median.
Detailed explanation-2: -Right skewed: The mean is greater than the median. The mean overestimates the most common values in a positively skewed distribution. Left skewed: The mean is less than the median. The mean underestimates the most common values in a negatively skewed distribution.
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