![]() ![]() If you want to know more about statistics, methodology, or research bias, make sure to check out some of our other articles with explanations and examples. NoteTo get a clear idea of your data’s variability, the range is best used in combination with other measures of variability like interquartile range and standard deviation. It can’t tell you about the shape of the frequency distribution of values on its own. Although we have a large range, most values are actually clustered around a clear middle.īecause only two numbers are used, the range is easily influenced by outliers. In the example above, the range indicates much more variability in the data than there actually is. ![]() With an outlier, our range is now 42 years. Using the same calculation, we get a very different result this time: Range example with an outlierOne value in your data set is replaced with an outlier. One extreme value in the data will give you a completely different range. Find open data about psychology contributed by thousands of users and organizations across the world. When paired with measures of central tendency, the range can tell you about the span of the distribution.īut the range can be misleading when you have outliers in your data set. There are 130 psychology datasets available on data.world. The range generally gives you a good indicator of variability when you have a distribution without extreme values. See editing example How useful is the range? Then subtract the lowest from the highest value. Participantįirst, order the values from low to high to identify the lowest value ( L) and the highest value ( H). Range exampleYour data set is the ages of 8 participants. This process is the same regardless of whether your values are positive or negative, or whole numbers or fractions. It is represented exactly as it was captured at its source without transformation, aggregation or calculation. Department of Justice or by its grantees and contractors may only be used for statistical and. Federal law and regulations require that research data collected by the U.S. include crime, justice and sociodemographic variables. These data span a wide variety of topics. The datasets listed on this page are: 'raw' or unaggregated data. It is likely that for each of several participants, there are data for several different variables: demographics such as sex and age, one or more independent variables. Even when you understand the statistics involved, analyzing data can be a complicated process. Subtract the lowest value from the highest value. Raw data is data that has not been processed for use. Data Sets A wealth of shared data are available for use in psychological science research. Describe the steps involved in preparing and analyzing a typical set of raw data.Order all values in your data set from low to high. ![]() The range is the easiest measure of variability to calculate. You can calculate the range by hand or with the help of our range calculator below.
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