How do you calculate the sum of squares? How do you calculate the sum of squares? multiply the degrees of freedom of the sample by the variance of the sample. divide the degrees of freedom of the sample by the variance of the sample. subtract the degrees of freedom of the sample from the N of the sample. multiply the N of the sample to the variance of the sample. You hypothesize that drinking water increases test scores, so you design a study comparing test scores between people who drink water and people who do not drink water. You collect data on 62 people and find that in your sample there are 27 people who do not drink water and 35 people who drink water. The mean test score for non-water drinkers is 62 with a standard deviation of 13, while the mean score for those who drink water is 75 with 11 as the standard deviation. What type of test would you perform? You hypothesize that drinking water increases test scores, so you design a study comparing test scores between people who drink water and people who do not drink water. You collect data on 62 people and find