Moreover, if “red” is preferred over “blue” by twice as many respondents then the degree of exactness (precision) is two-to-one. This indicates that a more precise measure of the respondents’ preference for “red” over “blue” is needed, even though both colors are popular with respondents. Mail and Internet surveys can frequently deliver precise results, but might not always produce the most generalizable results, most often because of the difficulty of obtaining a representative sample. Telephone surveys may be generalizable but might lack precision due to short questions and brief interview times.