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.
The blue parts of the z-score for a sample mean formula show the slight change from the z-score formula. We're using the sample mean instead of one-point (that's the bar over the x) and we're taking into account the sample size as well.o the z-score for a sample mean formula will tell us how many standard errors there are between the sample mean and the population mean. If the sample mean was identical to the population mean, the numerator would be 0, making the equation 0 (meaning 0 standard errors from the mean).