Knowledge about air duct cleaning is in its early stages, so a blanket recommendation cannot be offered as to whether you should have your air ducts in your home cleaned. The U.S. Environmental Protection Agency (EPA) urges you to read this document in it entirety as it provides important information on the subject.
Historically, IQ is a score obtained by dividing a personâs mental age score, obtained by administering an intelligence test, by the personâs chronological age, both expressed in terms of years and months. The resulting fraction is multiplied by 100 to obtain the IQ score.
On most modern IQ tests, the scale is arranged so that 95% of the scores spread out across a range of 70 to 130, with 66% falling within 85-115. In simpler terms, when taking an IQ test, youâre not being ranked against the test based on percent of questions answered correctly like any regular school test.