13)Suppose you know that the probability, P(z>x)=0.0668P(z>x)=0.0668. What is the value of xx?

14)A set of exam scores is normally distributed and has a mean of 71.6 and a standard deviation of 7.8. You choose a random score from the data set and the probability of getting a score less than or equal to this is 0.9911.

15)Eleanor scores 680 on the mathematics part of the SAT. The distribution of SAT math scores in recent years has been Normal with mean 595 and standard deviation 125. Gerald takes the ACT Assessment mathematics test and scores 27. ACT math scores are Normally distributed with mean 18.7 and standard deviation 2.5. (a) What is Eleanor's standardized score (z-score)? Round to 3 decimal places. (b) What is Gerald's standardized score? Round to 3 decimal places.

17)For the standard normal distribution (=0=0 and =1=1), USE TECHNOLOGY TO find P(z < -1.91).