'Quartiles' diaporamas de présentation

Section 3.3

Section 3.3. Measures of Relative Position. Topics. Determine the percentiles, quartiles, and five-number summary of a data set. Construct a box plot. Percentiles. Location of Data Value for the P th Percentile

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Descriptive Statistics II: Measures of Dispersion

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Dot Plots

Dot Plots. A dot plot is a type of graphical display used to compare frequency counts within categories or groups. Dot Plots. Dot Plots - Symmetry. A symmetric distribution can be divided at the centre so that each half is a mirror image of the other. Dot Plots - Skewness.

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Chapter 2

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Quartiles

Quartiles. What are they?. What is a Quartile?. There are 3 types of Quartiles: The Quartile The Upper Quartile The Lower Quartile A Quartile is the median of an ordered data set. The Upper Quartile is the median of the upper (higher) half of the data set.

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3.4

Measures of Position. 3.4. The standard deviation is a measure of dispersion that uses the same dimensions as the data (remember the empirical rule) The distance of a data value from the mean, calculated as the number of standard deviations, would be a useful measurement

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Describing Distributions with Numbers: Center

Describing Distributions with Numbers: Center. The Mean (average). Median. The median is the midpoint of a distribution. Half of the numbers are larger and half of he numbers are smaller. (n + 1)/2. Calculate the mean and median for each data set. 2, 2, 2, 2, 2, 2, 2, 2, 2.

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The 8-Step Continuous Improvement Model

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Intro to Numerical Descriptions of Quantitative Data

Intro to Numerical Descriptions of Quantitative Data. 8/31/11. Different Quantitative Data Types. Discrete Data result when the number of possible values is either finite or countable.

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Grouped Data Calculation

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Box and Whisker Plots and Quartiles

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Box Plots

Box Plots. Very useful graphical descriptive statistic Gives a clear picture of the data without using parametric statistics (such as the mean and standard deviation) Can tell if the data is skewed Outliers are obvious

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Cumulative Frequency and Box Plots

Cumulative Frequency and Box Plots. Learning Objectives. To be able to draw a cumulative frequency curve and use it to estimate the median and interquartile range and draw a box plot. Does anybody remember how to draw a Cumulative Frequency Diagram?. Cumulative Frequency Curves

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Box-and-Whisker Plots

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Box and Whisker

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Unit 8: Day 3 Box and Whisker Plots

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Quartiles of Data

Quartiles of Data. AS maths 2011. Find the mean, median, range and interquartile range for the following data sets. 1. 2 .

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