A researcher wants to test if there is a significance difference between the BMI of regular sugary beverage drinkers in 2010 (mean BMI = 26.5, reported by the National Health Survey, regular sugary beverage drinker defined as at least 1 sugary beverage drink daily) and in 2015. In December of 2015, the researcher collected a sample of 114 regular sugary beverage drinkers, she measured their BMIs and found that the average BMI was 30 with a standard deviation of 5. Which one of the following conclusions is INCORRECT?