To use Data Analysis Features in Excel, Data must be set up:

1.  First row has Field Names (Column Headers) in first row 
2.  Records are in rows
3.  No Blanks in column Headers
4.  No blanks columns or rows in data set
5.  Try not to have blank cells
6.  No data next to data set] (blanks or row/column headers all the way around data set)