A blood glucose test measures the amount of a sugar called glucose in a sample of your blood. Glucose is a major source of energy for most cells of the body, including brain cells. Carbohydrates are found in fruit, cereal, bread, pasta, and rice. They are quickly turned into glucose in your body.
A binary variable is the same thing as a â bit â in computer science or a âtruth valueâ in mathematical logic. They are basically different names for the same thing, much like statisticians call a Bell curve a â Normal Distribution â and physicists call it a â Gaussian distribution .â.
The ttest can also compare the proportions of binary variables. The mean of a binary variable is the proportion or percentage of success of the variable. When sample size is large, t-tests and z-test for comparing proportions produce almost the same answer.