The interquartile range is the difference between the first and third quartiles; it is the range of the middle 50 of the data.
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Q. 2The median, the midrange, and the midquartile are always the same value, since each is a middle value.
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Q. 3Each set of data has 100 percentiles; they divide the ranked data into 100 equal subsets.
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Q. 4The numerical value midway between the first quartile and the third quartile is referred to as the midquartile.
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Q. 5Each set of data has four quartiles; they divide the ranked data into four equal quarters.
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Q. 6In a box-and-whisker display, the length of the box is the same as the interquartile range.
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Q. 7The standard deviation of a sample is the square of the sample variance.
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Q. 8The range is the difference in value between the highest-valued (H) and the lowest- valued (L) data.
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