Find the z-score corresponding to the given value and use the z-score to determine whether the value is significant. Consider a score to be significant if its z-score is less than -2.00 or greater than 2.00. Round the z-score to the nearest tenth. A weight of 224 pounds among a population having a mean weight of 158 pounds and a standard deviation of 23.5 pounds. 2.8; not significant 2.8; significant O 65.8; significant O-2.8; not significant