The range shows the full spread of the data. To display a box and whisker diagram of your data, select Box plot. The simplest measure of spread in data is the range.

of the data. For instance, when the variance of data in a set is large, the data is widely scattered. Interquartile Range (IQR) represents the data between Q1 and Q3. By Inga Ting, Michael Workman . in statistics, spread describes the variability of a data set, that is, how the data is spread out and varies from the mean. When it is skewed right or left with high or low outliers then the median is better to use to find the center. Two measures of center are mean and median. To clear the calculator and enter a new data set, press "Reset". For more. This means the columns are a combination of variable names as well as some data. The Range tells you how much is in between the lowest value (start) and highest value (end). Range. 87,187. 61-74), or as the difference between the biggest and smallest (e.g. The most commonly used are: Range. Q1 represents a point where 25% of the data falls below it. Q3 = 3rd quartile or 75th percentile. measures of spread include the range; quartiles, deciles, percentiles; the five number summary; standard deviation and variance. Minimum value in data = 7. HIV remains a persistent public health problem in the United States. Spread describes the variation of the data. Range = Maximum Value in the data . A positive deviation occurs when the data value is greater than the mean, whereas a negative deviation occurs when the data value is less than the mean. An estimate of mean-time-to-failure (8) of 57 hours was obtained. Remember that the center is basically the point in the middle of your data. I couldn't find anything about it in the book, lecture notes, or online. Common examples of measures of statistical dispersion are the variance, standard deviation, and interquartile range. A distribution is characterized by three values: Location. Another measure of spread is the inter-quartile range (IQR), which is the range covered by the middle 50% of the data. The four ways to describe shape are whether it is symmetric how many peaks it has if it is skewed to the left or right and whether it is uniform. Q1 is the value below which 25 percent of the distribution lies, while Q3 is the value below which 75 percent of the distribution lies.

Though the average scores are same for both, John is more consistent because he . The more spread out a data distribution is, the greater its standard deviation. Quartiles and Percentiles. Types of descriptive statistics.