algebra find z scores 2

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.

 

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