How to Display Data by Jenny V. Freeman, Stephen J. Walters, Visit Amazon's Michael

By Jenny V. Freeman, Stephen J. Walters, Visit Amazon's Michael J. Campbell Page, search results, Learn about Author Central, Michael J. Campbell,

Powerful info presentation is an important ability for anyone wishing to demonstrate or submit study effects, but if performed badly, it could possibly show a deceptive or complicated message. This new addition to the preferred “How to” sequence explains tips to current information in magazine articles, supply purposes or examine displays in actual fact, thoroughly and logically, expanding the possibilities of profitable booklet.

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How to Display Data

Powerful facts presentation is a vital ability for anyone wishing to exhibit or put up learn effects, but if performed badly, it could actually show a deceptive or complicated message. This new addition to the preferred “How to” sequence explains the way to current info in magazine articles, supply functions or examine displays in actual fact, adequately and logically, expanding the probabilities of profitable ebook.

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In all the stem and leaf plots above, the leaves are arranged in the order of how the values occur in the data series and these are known as ‘as they come’ stem and leaf plots. 5. The ordered stem and leaf plot contains more information. For example given the sample size of the data set it is a simple matter to work out the median. 4 In this case there are 77 observations and thus the median is the 39th value Displaying quantitative data 35 (when the data are ordered), as 38 observations lie below this point and 38 lie above.

Thus bar charts have gaps between the categories on the horizontal axis in order to emphasise that the categories are completely separate, whereas there are no spaces in between the bins for a histogram, as the width of these bins can be set by the investigator. 1 could also be displayed as a histogram. This is because there are a large number of categories (14) of deaths per day and it is reasonable to treat such discrete count data as if they were continuous, at least as far as the statistical analysis goes.

The dots suggest that a quadratic relationship may not be unreasonable for these data. 4 Plotting a smooth curve through a set of data points using this statistical technique is called a Lowess Curve. Lowess curves are a useful way of visually 50 How to Display Data exploring the relationship between two continuous variables as the shape of the curve at any point along the axes is determined by the data nearest to it and not by all the data, thus they can be sensitive to small localised changes in the way that a simple linear regression line is not.

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