The term was taken from Senator Joseph Mccarthy. During the Second red scare in the 1940s and 1950s, there was a fear in America that the soviet union somehow managed to expand their influence within United States and took control of the united states government.
Senator Joseph Mccarthy use this fear to make several accusation toward his political rivals. He accused that these rivals somehow the supporter of Communism even without having any solid proof. It's a fear mongering tactic that he used to obtain support from the people to strengthen his position within the government.
1. In the data set, the sum of all the data points, divided by the number of data points; the average. 2. To find the mean, you add up all the data, and then divide by the number of data.
