Reasonable Dispersion for Composites

Hi Guys,

We are reviewing our composites at our firm. One quick question that I am struggling with, what is considered reasonable or narrow dispersion vs wide or unreasonable dispersion?

If a composite return is 5% for the year and the high/low range is 4%-6%, is that too wide? Does standard deviation alone tell you anything about dispersion?

I appreciate any thoughts on this.