Algebra - Find Z-scores

Algebra
Tutor: None Selected Time limit: 1 Day

In a random sample of adults aged 20-29, the middle 95% of the men are between 168 and 191 cm tall, and the middle 95% of the women are between 155 and 174 cm tall. The heights of each sex follow a normal distribution. Robert and Amanda are both 25 years old, and Robert is 12.7 cm taller than Amanda. Find their respective z-scores.

May 20th, 2015

20-29  95%  middle men

168-191 middle men 95% men

155-174 cm tall 

Robert  and  Amanda  are both 25 years old and robert is 12.7 cm taller than amanda


let Amanda be x 

robert's age x+27

May 20th, 2015

Where are the z-scores of Robert and Amanda?


May 20th, 2015

I am working them give me times I will  submit


May 20th, 2015

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May 20th, 2015
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May 20th, 2015
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