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Fix level formatting of all question with Yes/No type answers.
leveltestSPSS(x)
Surveyor data object
Other Functions to clean data: encToInt, fixCommonEncodingProblems, fixLevels01R, fixLevels01SPSS, fixLevels01, hasDK, intToEnc, leveltestR, removeAllDK, removeDK
encToInt
fixCommonEncodingProblems
fixLevels01R
fixLevels01SPSS
fixLevels01
hasDK
intToEnc
leveltestR
removeAllDK
removeDK