10. Missing data I.."I.I'hil:h of the following are valid reasons for why there may be missing data in a welldesigned study? Check all that apply. l_l Some respondents didn't knowI the answer to the question. lj Some respondents refused to answer the question. l_. Data are never missing in a welldesigned study. [T Researchers always have access to all values of all yarialzlles in the data set of a welldesigned study. I."Il'hy might eliminating respondents with missing data compromise the results of a study? '1.) A random sample may no longer be random if you eliminate some members of the sample. '1} The decrease in the sample size makes it more likely you will falsely reject a true null hypothesis