The t test is a two-tailed test because the tail of the distribution on each side of the mean is analyzed. For many laboratory measurements or clinical trials, one would want a two tailed test because the value or the outcome could be either above or below the mean.
Al Gore, in full Albert Arnold Gore, Jr. (born March 31, 1948, Washington, D.C., U.S.), 45th vice president of the United States (1993â2001) in the Democratic administration of President Bill Clinton.
Luis Acosta/AFP/Getty; Jon Clark/Rancho Santa Fe Review. Former Vice President Al Gore and his wife, Tipper, who separated in 2010 but still have not filed for divorce, have both found love again. âTheyâre each dating,â a friend of the former couple tells PEOPLE. Al, 64, has paired up with Democratic and environmental activist Elizabeth Keadle, 53.