Which of the following is true about z-scores and a t-scores for computing statistical tests for a mean? o t-scores can be used for proportions. O You compute them in the same way, but evaluate the probabilities of observing them on different distributions. They are the same in all respects. They both are evaluated through normal probabilities, but with different deviations. o The probability based on a t-score will always be less than the probability based on the same z-score. You compute them in different ways, but evaluate probabilities of observing them on the same distributions.