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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Identify the correct statements:
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The range informs the researcher of the overall spread of the data.
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The standard deviation informs the researcher of the overall spread of the data.
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The range provides a precise measure of dispersion as it informs the researcher of the average distance of each score from the mean.
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The standard deviation provides a precise measure of dispersion as it informs the researcher of the average distance of each score from the mean.
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Explanation:
Detailed explanation-1: -The reason why standard deviation is so popular as a measure of dispersion is its relation with the normal distribution which describes many natural phenomena and whose mathematical properties are interesting in the case of large data sets.
Detailed explanation-2: -By far the most commonly used measures of dispersion in the social sciences are variance and standard deviation. Variance is the average squared difference of scores from the mean score of a distribution. Standard deviation is the square root of the variance.
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