because they would tell other people that they know, and it would start out your business on a good foot as reliable and friendly. that alone would have people coming in to try it out for themselves. another reason would be because you don't want to look like a snotty business when you are just starting out and are small and not even anywhere near the big businesses.
If a mother is smoking and there are significant birth weights, a bar graph will be most effective. A bar graph can show how many children have similar weights, and you can tell which weights are most common.
