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.
Utah has youngest population in U.S. Published: Aug. 14, 2008 12:00 a.m. Once again, new census estimates peg Utah's population as the youngest among the states. And Utah is also home to eight of the 50 youngest-population counties in America (out of more than 3,100 counties nationwide). Estimates say that nearly a third of Utah's residents are under age 18, and one of every 10 residents is under age 5 â both tops in America.