The single-sample t-test compares the mean of the sample to a given number (which you supply). The dependent-sample t-test compares the difference in the means from the two variables to a given number (usually 0), while taking into account the fact that the scores are not independent.The independent samples t-test compares the difference in the means from the two groups to a given value (usually 0).he single sample t-test tests the null hypothesis that the population mean is equal to the given number specified using the option H0=. In our example, the t-value for variable write is 4.14 with 199 degrees of freedom.
Vermont had the second-highest median age, at 42.3 years. New Hampshire was third, with a median age of 42. Utah was the youngest state, with a median age of 29.9 years. Officials say among Maine counties, Lincoln is the oldest with a median age of 49.4 years. Androscoggin County was the youngest, at 40.5 years.
The honors go to Ronald Regan, who was also the oldest President elected, at the age of 69. Regan, who was born February 6, 1911, served two terms in office from 1981-1989. He â¦ was less than one month shy of his 78th birthday when succeeded by George H. W. Bush. Most people believe Jimmy Carter is the oldest surviving U.S. President at 86 years (in 2010), but George H. W. Bush is actually older by 111 days.