## Question 296:

1## Answer:

No answer provided yet.Use the percentile to z-score calculator and enter in .05. For both tails of the normal curve this corresponds to a z-score of -1.96 and for just one-tail this corresponds to a z-score of -1.64. If you don't know if you need one or two sided z-scores, then use the 2-sided value of -1.96.