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 older population also exceeded 15 percent of the populations of Pennsylvania and West Virginia. While southern states are regarded as retirement magnets, states in the Northeast and Midwest have among the largest proportional share of the elderly. States Ranked by Percent of Population Age 65 or Older, 2000.parsely populated states such as Alaska, Wyoming, Vermont, and North Dakota have very small elderly populations â less than 100,000 each in 2000. But the states with the most elderly do not necessarily have the oldest population age profiles.