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Inside this Book – Once you have collected data, what will you do with it? Data can be described and presented in many different formats. For example, suppose you are interested in buying a house in a particular area. You may have no clue about the house prices, so you might ask your real estate agent to give you a sample data set of prices. Looking at all the prices in the sample often is overwhelming. A better way might be to look at the median price and the variation of prices. The median and variation are just two ways that you will learn to describe data. Your agent might also provide you with a graph of the data. In this chapter, you will study numerical and graphical ways to describe and display your data. This area of statistics is called “Descriptive Statistics”. You will learn to calculate, and even more importantly, to interpret these measurements and graphs.
Inside this book –Collaborative Statistics PDF Book by Barbara Illowsky and Susan Dean – The statistic of a sampling distribution was discussed in Descriptive Statistics: Measuring the Center of the Data. How much the statistic varies from one sample to another is known as the sampling variability of a statistic. You t5^ically measure the sampling variability of a statistic by its standard error. The standard error of the mean is an example of a standard error. It is a special standard deviation and is known as the standard deviation of the sampling distribution of the mean. You will cover the standard error of the mean in The Central Limit Theorem (not now). The notation for the standard error of the mean is ^ where a is the standard deviation of the population and n is the size of the sample.
Collaborative Statistics by Barbara Illowsky and Susan Dean PDF : eBook Information
- Full Book Name – Collaborative Statistics
- Author of this Book – Barbara Illowsky and Susan Dean
- Language – English
- Book Genre –Textbook, Mathematics
- Download Format – PDF
- Size – 5.9 MB
- eBook Pages –728
- Price – Free