People who are within the same social class have similar income levels but usually do not share common tastes in clothing, decorating styles, and leisure activities

________ is useful because it ensures independence among observations

A) Process capability B) Optimization C) Population distribution D) Process stability E) Randomization

Which of the following is an effective strategy for proofreading?

A) Read the document several times in one session B) Use distractions as a way to refocus C) Give yourself some time after finishing the first draft D) Proofread immediately after finishing the document E) Read the document from start to finish twice