New York was the only major city in the study with a sample large enough to allow such a statistically valid claim, they said.

When appropriate, you may use a statistically valid sampling plan as a part of your quality control and testing program.

The officials said the survey was the first statistically valid look at the city's hospitals, which often conducted their own anecdotal studies.

It is statistically valid for all 180,000,000 adult Americans.

The company says it has conducted the "first statistically valid survey" of Internet users.

Even most big companies do not have enough employees to gather statistically valid information.

Both tendencies were modest, and the department said it could draw no statistically valid conclusions.

But so far, he said, the drug companies have not been able to prove their savings by doing a statistically valid analysis.

The study found that there was no statistically valid difference in levels of thyroid hormone between the groups.

A State's accountability system must be statistically valid and reliable.