18 pts Group of answer choices ensuring data is free of errors [ Choose ] deliberate or accidental omission of data [ Choose ] data scattered in the data base without any pattern [ Choose ] an apparent pattern of missing data [ Choose ] simplest approach to missing data [ Choose ] useful when data is missing however is biased [ Choose ] unexpected value outside the expected range of data [ Choose ] require that certain assumptions are met and violations of the assumptions influence the validity of statistical results [ Choose ] Answers bank: missing data, random missing data, parametric test, data cleansing, nonrandom missing data, deletion, estimation, outlier