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how to calculate sample mean for grouped data. By the same token to get the variance just raise the standard deviation to the power of 2. Mean Median and Mode for grouped data Formula Examples We use cookies to improve your experience on our site and to show you relevant advertising.
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To calculate the mean of grouped data the first step is to determine the midpoint also called a class mark of each interval or class. This statistics video tutorial explains how to calculate the mean of grouped data. There are three main steps.
F 15 cumulative frequency of the pre median class.
Mode. For grouped data class mode or modal class is the class with the highest frequency. To find the mean use the formula. Mean equals the sum of the numbers in the data set divided by the number of values in the data set.
