______________________________________________________________________________ 3. Use a colon between independent clauses if the second clause summarizes or explains the first. A colon is used to introduce an idea that is an explanation or continuation of the one that comes before the colon. The colon can be considered as a gateway inviting the reader to go on. Look at these examples: Ben suddenly canceled his evening plans for a simple reason: his car was out of gas.
Measures of Center: Mean, Median, and Mode Measures of center generally tell us about the middle, or center, of a distribution. They are the mean, the median, and the mode. Each plays a useful role in Statistics. The Mean The mean, or arithmetic average, is calculated by adding all the data values and dividing by the number of values.
Measures of Center. Measures of center are some of the most important descriptive statistics you can get. In our society, we always want to know the average of everything: the average age, average number, average speed, etc. etc. It helps give us an idea of what the most common, normal, or representative answers might be. Essentially, by getting an average, what you are really doing is calculating the middle of any group of observations. There are three measures of center that are most often used: 1  mean. 2  median.  and mode.