For a variable salary we have the statistics as shown in the figure below.
The reported Mean is incorrect because a value, -9999, is included in its calculation. How can this situation be fixed?
A. Define -9999 as a system-missing value.
B. Remove all cases with the value -9999 for the variable salary from the data file.
C. Define -9999 as a user-missing value.
D. Define -9999 as both a system- and user-missing value.
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