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?
Which statement is true about IOR (inter quartile range)? (Choose two.)
There are two major types of errors one can make when attempting to draw conclusions about the larger population based on the information collected in the sample. For example, when performing an Independent Samples T-Test, one type of error that can occur is when there are significant differences between the groups based on a scale level dependent variable, but the test fails to detect them. Which of the following choices describe this sort of error? (Choose two.)
As of PASW Statistics 17, options for exporting tables to Excel files include which of the following? (Choose all that apply.)
In order to import data from database sources such as Access and Oracle into IBM SPSS Statistics, you must first export the data from the database to a tad file and then import this tad file into IBM SPSS Statistics?
Which options are available to edit bar charts? (Choose three.)