Chap3sum
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The document discusses different measures of central tendency including the mean, median, and mode. It explains that the mean is calculated by summing all the values and dividing by the number of observations. The median involves arranging the data and selecting the middle value for odd numbers of observations or averaging the two middle values for even numbers of observations. Measures of central tendency are used to identify the central or typical value in a data set.
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Chap3sum
- 1. •The sample mean, used to estimate the population mean µ, is computed as If N is odd, the median position equals , and the value of the Chapter 3: Measures of Central Tendency and Location , where n is the number of observations in the sample. Summation The sample mean, used to estimate the population mean µ, is computed as The first step in calculating the median, denoted by Md, is to arrange the data in an array. If N is odd, If N is even,
- 2. Chapter 3: Measures of Central Tendency and Location Measures of Central Tendency In statistics, an average is a measure of central tendency. It is a single number that can represent a set of data. There are three kinds of averages, namely: mean, median and mode. A measure of central tendency is any single value that is used to identify the “center” of the data or the typical value. It is often referred to as the average.
- 3. Chapter 3: Measures of Central Tendency and Location The Arithmetic Mean The most common average and sometimes simply referred to as the mean. The sum of all the values of the observations divided by the number of observations. The mean for a finite population with N elements, denoted by the Greek letter µ (mu).