According to Professor James Jones of Richland Community College, the modal class in statistics, commonly called the mode, is the raw data unit that occurs most often within a data set. This is a part of descriptive statistics, as it is the frequency of data.Know More
To find the single most frequent score or the most frequent group of scores in a raw data set, researchers use stem-and-leaf plots, database management programs, statistical programs or count by hand. Quantitative studies produce raw numerical data. Researchers transform information from qualitative studies into categories that researchers then count as frequencies. As a description of the data, the mode does not make inferences or predictions about the frequency of the data in a population. It provides information on the specific sample. This allows researchers to quickly assess the most common answer to a question or the most frequent choice in a study for preliminary analysis.
The other measures of central tendency include the mean and the median. The mean is the average in the data set. A simple calculation for the mean is to add all the integers and divide by the number of total integers in the sample. To find the median, or middle number, the data set must be in numerical order. Then researchers divide the total number of integers by two to find the middle position.Learn more about Statistics
Experts use statistics to understand large and complex sets of data. Statistics are also helpful with surveys, which legislators use to affect policy. Knowing how statistics work is important for fully understanding news reports.Full Answer >
To find the range in a given data set, put the data set in numerical order from least to greatest, and then subtract the lowest value from the highest value. The range is how far apart the highest and lowest values are.Full Answer >
The Interquartile Range Formula appears as "Q3 - Q1," where Q3 is the upper quartile and Q1 is the lower quartile of a data set. The interquartile range is also commonly referred to as the middle fifty or midspread.Full Answer >
A mathematical outlier, which is a value vastly different from the majority of data, causes a skewed or misleading distribution in certain measures of central tendency within a data set, namely the mean and range, according to About Statistics. The affected mean or range incorrectly displays a bias toward the outlier value. The median and mode values, which express other measures of central tendency, are largely unaffected by an outlier.Full Answer >