What does the interquartile range describe

    • [PDF File] Dealing With Non‐normal Data - Wiley Online Library

      http://5y1.org/file/26937/dealing-with-non‐normal-data-wiley-online-library.pdf

      describe, and analyze non-normal data, and clarifies when the “normality assumption” ... data, it is preferable to report the interquartile range as a measure of variability. The interquartile range gives the middle 50% of the data, so is not influenced by extreme values (or by right or left tails). The interquartile range is

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    • [PDF File] Range and Interquartile Range

      http://5y1.org/file/26937/range-and-interquartile-range.pdf

      How can you describe data with range and interquartile range? Use this space to write any questions or thoughts about this lesson. Range tells us if data is grouped closely together or spread far apart. Interquartile range tells us if data is grouped closely around the median. Title: Range and Interquartile Range Author:

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    • [PDF File] MATHLINKS: GRADE 6 STUDENT PACKET 5 DATA AND …

      http://5y1.org/file/26937/mathlinks-grade-6-student-packet-5-data-and.pdf

      The range and interquartile range (IQR) are two measures of spread for a data set. 1. Describe how to find the range of a data set. 2. Find the range for the class data set. 3. How can you remember that quartiles 1, 2, and 3 (Q1 , Q2 = M, Q3) divide the data points into four equal parts of data? (Hint: Refer to problem 1 in the warmup on page 1 ...

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    • [PDF File] 7.2 Box-and-Whisker Plots - Big Ideas Learning

      http://5y1.org/file/26937/7-2-box-and-whisker-plots-big-ideas-learning.pdf

      Find and interpret the range of the data. b. Describe the distribution of the data. c. Find and interpret the interquartile range of the data. d. Are the data more spread out below Q1 or above Q3? Explain. SOLUTION a. The least value is 160. The greatest value is 300. So, the range is 300 − 160 = 140 seconds. This means that the song lengths

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    • [PDF File] Syntax - Stata

      http://5y1.org/file/26937/syntax-stata.pdf

      Similarly, the idea of the median is quite old. The history of the interquartile range is tangled up with that of the probable error, a long-popular measure. Extending this in various ways to a more general approach based on quantiles (to use a later term) occurred to several people in the

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    • [PDF File] 7.2 Choosing Appropriate Measures

      http://5y1.org/file/26937/7-2-choosing-appropriate-measures.pdf

      • use the IQR to describe the variation. When a data set does not contain outliers, you can use either the mean or the median to describe the center, and either the range or the IQR to describe the variation. 7.2 Lesson GO DIGITAL Example 1 Choosing Appropriate Measures You can use measures of center and measures of variation to describe data ...

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    • [PDF File] 10.4 Box-and-Whisker Plots - Big Ideas Learning

      http://5y1.org/file/26937/10-4-box-and-whisker-plots-big-ideas-learning.pdf

      Both boxes appear to be the same length. So, the interquartile range of each data set is equal. However, the range of the prices in Store B is greater than the range of the prices in Store A. So, the prices in Store B are more spread out. 3. The double box-and-whisker plot represents the life spans of crocodiles and alligators at a zoo.

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    • [PDF File] DATCB/565 Comp 1 Rubric

      http://5y1.org/file/26937/datcb-565-comp-1-rubric.pdf

      and interquartile range (IQR) for each of the variables (weight 5%) Accurately inserted new column in the database titled “AnnualSales” and correctly calculated all of the following: the mean, standard deviation, skew, 5-number summary, and interquartile range (IQR) for each of the variables Accurately inserted new column in

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    • [PDF File] Census in counties - Describing and comparing historgrams …

      http://5y1.org/file/26937/census-in-counties-describing-and-comparing-historgrams.pdf

      • Students will be able to analyze data and describe data distributions. ... • Interquartile range (IQR) – a measure of variability in a set of numerical data to indicate the difference between the lower and upper quartiles of the data set • 5-number summary – a summary that provides information about a data set and contains five ...

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    • [PDF File] Median and Interquartile Range -- Nonparametric Univariate …

      http://5y1.org/file/26937/median-and-interquartile-range-nonparametric-univariate.pdf

      The interquartile range (IQR) is the range of values within which reside the middle 50% of the scores. The lower bound of the interquartile range is called the first quartile (Q1) -- 25% of the scores have a value lower than Q1 and 75% of the scores have a value larger than Q1. The upper bound of the interquartile range is called the third ...

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    • [PDF File] 5 Measures of Dispersion 5.1 Introduction 5.2 The Range

      http://5y1.org/file/26937/5-measures-of-dispersion-5-1-introduction-5-2-the-range.pdf

      5.3 The interquartile range 57 5.4 Standard deviation 58 5.1 Introduction In the previous chapter on measures of location we considered the first of two important summary ... single summary value with which to describe the dispersion of a data set. It should be noted, that, as was the case with measures of location, it ...

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    • [PDF File] Median and IQR - Education Technology

      http://5y1.org/file/26937/median-and-iqr-education-technology.pdf

      interquartile ranges. Prerequisite Knowledge Vocabulary Median and Interquartile Range is the second lesson in a series of lessons that investigates the statistical process. In this lesson students are introduced to the median and, by taking the median of each half of the data, to quartiles and the interquartile range. This

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    • [PDF File] 9.5 Mean Absolute Deviation - Big Ideas Learning

      http://5y1.org/file/26937/9-5-mean-absolute-deviation-big-ideas-learning.pdf

      REASONING Find the range and the interquartile range of the data set in Activity 1. What do you think it means when these values are close to 0? Explain. Work with a partner. Use the information in Activity 1. a. Complete the table below. Add rows if needed. Be sure to fi nd the sum of the values in the last column of the table. Student with Score

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    • [PDF File] 9.4 Measures of Variation - Big Ideas Learning

      http://5y1.org/file/26937/9-4-measures-of-variation-big-ideas-learning.pdf

      Learning Target: Find and interpret the range and interquartile range of a data set. Success Criteria: • I can explain how the range and interquartile range describe the variability of a data set with a single number. • I can fi nd the range and interquartile range of a data set. • I can use the interquartile range to identify outliers.

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    • [PDF File] summarize — Summary statistics

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      Similarly, the idea of the median is quite old. The history of the interquartile range is tangled up with that of the probable error, a long-popular measure. Extending this in various ways to a more general approach based on quantiles (to use a later term) occurred to several people in the

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    • [PDF File] Measures of Variability - SAGE Publications Inc

      http://5y1.org/file/26937/measures-of-variability-sage-publications-inc.pdf

      Measures of variability Numbers that describe diversity or variability in the distribution. In this chapter, we discuss five measures of variability: the index of qualitative variation, the range, the interquartile range, the standard deviation, and the variance. Before we discuss these measures, let’s explore why they are important.-

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    • [PDF File] GRAPHS AND STATISTICS Central Tendency and …

      http://5y1.org/file/26937/graphs-and-statistics-central-tendency-and.pdf

      Interquartile Range : Standard Deviation : Normal Curve : Outliers (extreme data points) BIG IDEAS: Measures of Central Tendency A measure of central tendency is a summary statistic that indicates the typical value or center of an organized data set.

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    • [PDF File] Measures of Variability - SAGE Publications Inc

      http://5y1.org/file/26937/measures-of-variability-sage-publications-inc.pdf

      the range, the interquartile range, the standard deviation, and the variance. Before we discuss these measures, let’s explore why they are important. -THE IMPORTANCE OF MEASURING VARIABILITY The importance of looking at variation and diversity can be illustrated by thinking about the differences in the experiences of U.S. women.

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    • [PDF File] CORE Summarising numerical data: the median, range, …

      http://5y1.org/file/26937/core-summarising-numerical-data-the-median-range.pdf

      The interquartile range The interquartile range (IQR)isdefined to be the spread of the middle 50% of data values, so that: IQR = Q 3 − Q 1 To calculate the IQR,itisnecessary to first calculate the quartiles,Q 1 and Q 3.Inprinciple, this is straight forward as: Q 1 is the midpoint of the lower half of the data values Q

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