When a factor is controlled by setting it to three levels, the particular factor is of no interest to the researcher. (b) Randomization is used so that those factors not controlled in the experiment "average out" their effect on the response variable.

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

For the equations below which statement is true ? -2x=14 6x=-42

Which of the following expressions is equal to 2x^2+8