______________________________________________________________________________ 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.
The mean is a good measure of central tendency to use when a data set doesn't have any outliers, often referenced with standard deviation estimation. The median of a data set illustrates the middle value when the set is ordered in ascending or descending. The median is an average of two middle values if a data set contains even number of values. The median is a good measure of central tendency to use when a set of data has an outlier. The mode of a data set illustrates which value occurs very often. In other words the highest repetition of a same number in a data set is considered to be mode for a data set.