You Are Computing a New Variable Called CRIMEALL

question 19

Short Answer

You are computing a new variable called CRIMEALL. It is the average of four variables already in your data set: CRIMESA, CRIMESB, CRIMESC, and CRIMESD. Write the numeric expression (formula) for a compute command that averages these four variables as long as at least one of the CRIME variables being averaged has a valid value.
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Definitions:

Fraction

A mathematical expression representing the division of one quantity by another, indicating parts of a whole or a ratio.

Ozone Layer

A layer in the earth's stratosphere containing a high concentration of ozone, which absorbs most of the sun's ultraviolet radiation.

Ice Crystals

Water molecules in the solid state that manifest in symmetrical patterns, typically forming under low temperature conditions in the atmosphere or on surfaces.

Southern Hemisphere

The half of Earth that lies south of the equator, encompassing parts of South America, Africa, Australia, and Antarctica.