Read e-book online Business Statistics: A Multimedia Guide to Concepts and PDF

By Moya McCloskey

ISBN-10: 0340719273

ISBN-13: 9780340719275

ISBN-10: 0585497427

ISBN-13: 9780585497426

This publication and CD pack is the 1st mutimedia sort product aimed toward instructing uncomplicated information to company scholars. The CD presents desktop dependent tutorials and customizable sensible fabric. The ebook acts as a learn advisor, permitting the coed to envision earlier studying. The software program is Windows-based and generates suggestions and responses based on the student's enter.

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There are also two common measures of variability in a set of responses, and they are the semi-interquartile range and the standard deviation. While these two sets of summary measures are measuring the same quantities, they do so in different ways and so are not interchangeable. 1 Location: mean and median The mean of a sample of observations is the arithmetic average, and is obtained by adding up all the numbers and dividing by the number of observations. It is a relatively straightforward calculation and is done automatically on many calculators, spreadsheets and statistical programs.

The statistical modelling analysis tries to take into account the most important effects and relationships with a view to making sure that the comparisons are as equitable as possible. These are often known as adjusted comparisons, and the purpose of statistical modelling here is to make comparisons of like with like so that there is no bias involved in the comparison. Chapter: graphs, relationships, correlation, linear regression, estimation. 6 Common features of statistical studies: what exactly is Each of these examples has certain common features and these will be discussed throughout the book.

The lines on these graphs are known as regression lines and they can be used to predict the turnover. For example, in a shop with a surface area of 400 square metres we would predict a turnover of around £11000 per week. The last plot is known as a boxplot and shows the association between turnover and whether or not there is a competing supermarket in the neighbourhood. As the box is lower down when there is a competitor, this suggests that the turnover is lower when a competitor is close by. All of these observations make economic sense, and by combining all the information the company hoped to build a good prediction model which would help them in their decision-making.

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Business Statistics: A Multimedia Guide to Concepts and Applications by Moya McCloskey

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