Assume a normal distribution Give your answer correct to two

Assume a normal distribution. (Give your answer correct to two decimal places.) Find the z-score associated with the 56th percentile. Find the z-score associated with the 79th percentile. Find the z-score associated with the 99th percentile. You may need to use the appropriate table in Appendix B to answer this question.

Solution

A)

We get the z score from the given left tailed area. As          
          
Left tailed area =    0.56      
          
Then, using table or technology,          
          
z =    0.15 [ANSWER]

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b)

We get the z score from the given left tailed area. As          
          
Left tailed area =    0.79      
          
Then, using table or technology,          
          
z =    0.81 [ANSWER]

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c)

We get the z score from the given left tailed area. As          
          
Left tailed area =    0.99      
          
Then, using table or technology,          
          
z =    2.33 [ANSWER]