October 28, 2009 by kbomgarden. October 28, 2009 by kbomgarden.

In a data set, the sum of all the data points, divided by the number of data points. The median of a set of numbers is the value for which half the numbers are larger and half are smaller. If there are two middle numbers, the median is the arithmetic mean. Of the two middle numbers. A method of gathering information about a group.

4 This type of sampling, telephone sampling, would not be a random, large sampling, because some people do not have a landline phone or phone service at all. Also some people have unlisted phone numbers. 5 Unlisted phone numbers and people without landlines or numbers that would be in the phonebook would be left out of the sample. When the envelopes with potential money in them were returned, the.