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"Drinking Highest Among Educated, Upper-Income Americans" -- Can you trust this (or any other poll)? Daily Data has some answers. Scroll down.

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"Drinking Highest Among Educated, Upper-Income Americans" -- Can you trust this (or any other poll)?

Multiple polls and surveys hit the Internet and the media every day. Some come from professional polling companies like Gallup whose only business is polling. Gallup, like Pew and Harris have become trusted names with reliable data that have proved themselves over time.

Looking at those companies offers valuable lessons to consider when deciding whether to trust the polls and surveys offered by various companies, trade groups and other organizations..

How do you know which ones to trust? Sadly, many of those polls fall short from a lack of standards, transparency and disclosure. That means many of those polls and surveys are simply junk data.

What makes a trustworthy survey?

Drinking Highest Among Educated, Upper-Income Americans

Properly done polls -- such as this recent one from Gallup always -- ALWAYS -- include the following specific disclosure information. Polls which do not include this should not be trusted.

Survey Methods: "Results for this Gallup poll are based on telephone interviews conducted July 8-12, 2015, with a random sample of 1,009 adults, aged 18 and older, living in all 50 U.S. states and the District of Columbia. For results based on the total sample of national adults, the margin of sampling error is ±4 percentage points at the 95% confidence level.

"For results based on the total sample of 664 drinkers, the margin of sampling error is ±4 percentage points at the 95% confidence level.

"All reported margins of sampling error include computed design effects for weighting. "Each sample of national adults includes a minimum quota of 50% cellphone respondents and 50% landline respondents, with additional minimum quotas by time zone within region. Landline and cellular telephone numbers are selected using random-digit-dial methods." Learn more about how Gallup Poll Social Series works.

As the Gallup poll noted, a trustworthy survey will disclose:

The date of the poll
The method of polling
The protocol for selecting a sample representative of a larger population
The number polled
A validly derived sampling error estimate and a confidence level.

In addition, trustworthy surveys, will include details allowing a close examination for validity: Gallup: View survey methodology, complete question responses and trends. Surveys that do not include that degree of detail are always suspect.

Read more about poll trustworthiness and common condemned practices at this link

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