## Question 298:

Asked on July 29, 2008

1

## Answer:

No answer provided yet.You need another data-point to calculate the z-score. You have the mean and standard deviation, you need their mean or some test mean to generate a z-score which would be your test-value. The critical value is -1.96 or the z-score corresponding to 5% of the area under both tails of the normal curve which you can lookup using the

percentile to z-score calculator. Often the critical value is just reported as 1.96.