Which is standardized z-score for your 'building_height' variable. Which of the following describes the steps required to standardize the variable?

Analyze --> Frequencies --> Move variable to the 'Variable(s)' box --> Click 'Statistics' --> Check 'Standardize'.

Analyze --> Descriptive--> Move variable to the 'Variable(s)' box --> Check 'Save standardized values as variables'

Create new variable in 'Variable View' --> In 'Data View', hand calculate the z-score for each data point and enter it.

File --> Save As --> Name your data set 'standardize' --> Save.