A cross-tabulation table cross-tabulates two nominal and/or ordinal variables by one another. ...

A cross-tabulation table cross-tabulates two nominal and/or ordinal variables by one another.
 
  Indicate whether the statement is true or false.

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When you _____________________________ __ a variable, you reduce the number of categories or values of the variable to a smaller number of categories by combining categories or values of the variable.
 
  Fill in the blank(s) with the appropriate word(s).

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Given a normally distributed variable with a mean of 70 and a standard deviation of 10, which of the following is the most appropriate statement?
 
  A. 50 of all cases fall within one standard deviation of the mean.
  B. Approximately 95 of all cases fall within the range 60 to 80.
  C. Approximately 68 of all cases fall within the range 60 to 80.
  D. None of the above is correct.