Q.State three advantages of the sample method over the census method.

Businesses and government agencies almost always prefer the sample method for routine surveys, for several practical reasons.

1. Reduced cost — surveying a sample of 500 customers costs far less than surveying all 20,000.
2. Saves time — sample results are available quickly enough to support a timely business decision, whereas a census can take months or years.
3. Necessary for destructive testing or very large populations — where testing destroys the unit (e.g., testing the shelf life of a food product) or the population is too large to enumerate practically, sampling is the only workable choice. …

Listing 'no sampling error' as an advantage of the sample method — this is backwards; it is the census that has no samplin …