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.
Best Answer: None of the answers is correct. If the oldest person in a group is 80 and the youngest is 20, the median age is 50. It doesn't make any difference if there are 100 people in the group and 90% are over 50. The median age is still 50. The average age is computed by adding up all the ages of the 100 people and dividing that total by 100. If 90% of the people are over 50, the average could be 65 or more. Source(s):