Rarely, proton pump inhibitors (such as omeprazole) have caused vitamin B-12 deficiency. The risk is increased if they are taken every day for a long time (3 years or longer). Tell your doctor right away if you develop symptoms of vitamin B-12 deficiency (such as unusual weakness, sore tongue, or numbness/tingling of the hands/feet).
Stability reliability refers to the consistency of students' scores when a test is administered to the same students on two different occasions. Alternate-form reliability describes the consistency of students' performances on two different (hopefully equivalent) versions of the same test.
One Sample T-test. 2. Degrees of Freedom. â¢degrees of freedom ( ) are defined as the number of. scores in a sample that are free to vary. â¢we know that in order to calculate variance we must. know the mean ( ) â¢this limits the number of scores that are free to vary. â¢ df â 1 where is the number of. scores in the sample. X.