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Here we will learn about a quartile, including what a quartile is, how to find the lower quartile and upper quartile for a set of data, and why these measures are useful. There are also quartile worksheets based on Edexcel, AQA and OCR exam questions, along with further guidance on where to go next if you’re still stuck.
The upper quartile value is the median of the upper half of the data. The interquartile range is the difference between the upper and lower quartiles: \( IQR = Q_3 - Q_1 \). Outliers are the points lying beyond the upper boundary of \(Q_3 + 1.5 \times IQR\) and the lower boundary of \(Q_1 - 1.5 \times IQR\).
Calculate the quartiles Q1 and Q3 for wages of the labours given below. 1. Quartiles for Raw or Ungrouped data: 2. Quartiles for Continuous series (grouped data)
Here you will learn about a quartile, including what a quartile is, how to find the lower quartile and upper quartile for a set of data, and why these measures are useful. Students will first learn about quartiles as part of statistics and probability in 6 6 th grade.
The upper quartile (Q_3) is the value in the ordered data such that 75\% of the data is smaller than it and 25\% of the data is larger. In a data set size n , Q_3 is in position \dfrac{3(n+1)}{4} Q_2 denotes the median , found at \dfrac{n+1}{2}
5 wrz 2023 · The Corbettmaths Practice Questions on Quartiles and the Interquartile Range from a List.
Example: 5, 7, 4, 4, 6, 2, 8. Put them in order: 2, 4, 4, 5, 6, 7, 8. Cut the list into quarters: And the result is: Quartile 1 (Q1) = 4; Quartile 2 (Q2), which is also the Median, = 5; Quartile 3 (Q3) = 7
