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Oct
Definition Of Interquartile Range In Statistics. From the Cambridge English Corpus. And they are denoted by Q1 Q2 and Q3 respectively. The interquartile range IQR is the difference of the first and third quartiles. The interquartile range formula is shown below.
The interquartile range IQR contains the second and third quartiles or the middle half of your data set. Quartiles divide a rank-ordered data set into four equal parts. From the Cambridge English Corpus. Engineering Student Outcomes for Grades 9-12. This range contains one half of the total frequency and provides a simple measure of dispersion which is useful in descriptive statistics. In descriptive statistics the interquartile range tells you the spread of the middle half of your distribution.
The interquartile range is defined as the difference substraction between the upper and lower quartiles.
When a data set has outliers variability is often summarized by a statistic called the interquartile range which is the difference between the first and third quartiles. The interquartile range formula is shown below. The range of values of the variable in a statistical distribution that lies between the upper and lower quartiles. Quartile divides the range of data into four equal parts. Quartiles divide a rank-ordered data set into four equal parts. The interquartile range IQR was used as the statistic for variability of rating and ranking responses and an IQR of 1 was determined by the researchers to indicate consensus on an item.