SPSS Syntax to answer Simple Slope question? HELP!

#1
Hey guys,

I'm trying to complete my stats homework and, honestly, have been stumped on a set of two questions for a little while now.

The question is basically asking me to, via an SPSS syntax command, determine the simple slope of X at one standard deviation above the mean of Z/below the mean of Z, and to indicate whether or not it is significant and what the confidence intervals are.

This is the syntax I used:

compute xc1 = z - 1.73205.
compute xc2 = z + 1.73205.
execute.

DESCRIPTIVES
VARIABLES=xc1 xc2
/STATISTICS=MEAN STDDEV MIN MAX .

REGRESSION
/MISSING LISTWISE
/STATISTICS COEFF OUTS CI BCOV R ANOVA
/CRITERIA=PIN(.05) POUT(.10)
/NOORIGIN
/DEPENDENT y
/METHOD=ENTER xc1 xc2 .


So basically, now I am looking at output which, to me, doesn't make sense...leading me to wonder if I entered the proper SPSS command. This problem is SO frustrating to me because our professor didn't give us an example of what syntax to use to address this specific problem, so I've been pulling my hair out for nearly 30 minutes now.

Any help would be appreciated...and I mean ANY. I would even be happy to attach my output file from SPSS, if it helps.

Thanks.