Statistics for Describing, Exploring, and Comparing Data

Statistics for Describing, Exploring, and Comparing Data

1. measure of center

   • Is a value at the center or middle of a data set.

2. arithmetic mean

   • set of data is the measure of center found by adding the data values and dividing the total by the number of data values.

3. median

   • Of a data set is the measure of center that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude

4. The mode

   • of a data set is the value that occurs with the greatest frequency.

5. The midrange

   • of a data set is the measure of center that is the value midway between the maximum and minimum values in the original data set.

6. A distribution of data is skewed

   • if it is not symmetric and extends more to one side than to the other

7. symmetric i

   • if the left half of its histogram is roughly a mirror image of its right half.)