The 2016 Puerto Rico Democratic primary took place on June 5<span> in the U.S. territory of Puerto Rico as one of the Democratic Party's primaries ahead of the 2016 presidential election.
The case of the extraneous variable is most likely to be determined by the student grade level that is level of the education program that is for the grade level. This refers to all the course level and can be use to trace out the external variable that are not intentionally studied in the test or experiment and tends to affect the other variables.
