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 oldest living US veteran, age 108, credits drinking whiskey and smoking a dozen cigars every day for his long life. Richard Overton, the oldest living United States veteran at 108 years old, credits his longevity to two things. First there's his 'medicine' - the tablespoon of whiskey he adds to his morning coffee, which he claims keeps his muscles tender. Then there's the dozen or so cigars he smokes - but doesn't inhale - everyday.