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How to find interquartile range - Algebra 1
The inter-quartile range is the range in which the middle 50% of the data points fall (i.e. the distance between the 1st and 3rd quartile) and would be calculated as follows for the above data set: 25% of n = 25% x (n+1) = 0.25 x 9 = 2.25. Therefore the 1st quartile lies between the 2nd and 3rd lowest observations (i.e. 3 &4).
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[DOCX File]Chapter 03 - Descriptive Statistics: Numerical Measures
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Directions: Solve the following problems by finding the median, interquartile range (IQR), or range. You may use a calculator, but you must show your work! 1. {13, 15, 9, 35, 25}
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[DOC File]Name
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The interquartile range is the absolute difference between the upper quartile (Q3 … the three-quarter point) and the lower quartile (Q1 … quarter point). Expressed symbolically we have: Interquartile range …
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[DOC File]Calculation of Inter-Quartile Range (IQR)
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– The interquartile range is calculated by subtracting the 25th % value from the 75th % value. It is the range of concentrations containing the central 50% of the data. The IQR is based around the median.
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[DOC File]AP Statistics Review – Chapter 1
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B. Range= max- min. And here, the first quartile is bigger than the min, so the IQR = Q3-Q1 is smaller than the range. A. For example, N~(2, 20) is also a normal distribution. The mean can be positive, negative or zero. D. Because the variance involves squaring the deviations, it does not have the same unit of measurement as the original ...
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[DOC File]Introduction
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range, calculated as the difference between the maximum and minimum values in the data. Another measure of variability is the . interquartile range (IQR), the difference between the . upper quartile. and the . lower quartile. of the distribution.
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[DOC File]Topic of 5:
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(1) the interquartile range (IQR) is calculated: Q3 – Q1 = 27.4 – 25 = 2.4 cm (2) 1.5(IQR) is 1.5(2.4) = 3.6 cm (3) 25 – 3.6 = 21.4 cm (4) 27.4 + 3.6 = 31 cm. Any shoe print length values smaller than 21.4 cm or greater than 31 cm are outlying values. There is one female student with …
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[DOCX File]American Statistical Association (ASA)
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(b) IQR (Interquartile range) = Q3 – Q1 * Note – outliers are more than 1.5 times the IQR above Q3 or below Q1 (c) range. One-Variable Data in different forms: Quiz scores: 28 38 42 33 29 28 41 40 15 36 27 34 22 23 28 50 42 46 28 27 43 29 50 29 32 34
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[DOC File]Sample Test Questions -- Test 1 - University of Florida
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[2 marks] (b) Find the interquartile range of the scores. [2 marks] Question 4. (AQA November 2004 Higher Paper 2 Calculator OK) The histogram below shows the test scores of 100 female students. (a) What is the median score? [1 mark] (b) What is the interquartile range? [1 …
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[DOC File]Statistical Definition Summary
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The interquartile range is the difference between the _____. ... The weight (in pounds) of a sample of 36 individuals was recorded, and the following statistics were calculated. ...
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How is the interquartile range calculated