In a study of the effect of glucose on insulin release, pancreatic tissue samples from 54 laboratory animals were treated. The average amount of insulin released was 199.00 U / mL. It is known that the population follows a normal distribution with a variance of 169.00 U / mL. Can it be concluded from these data that the average insulin released in the population is different from 204.00 U / mL? Use the z distribution to test your hypothesis. Let level of significance= 0.05