From 1776-1800, the average age of first marriage for a male in Western Europe was 26.4 years, with a standard deviation of 6.1 years. Assume the ages are normally distributed. The 80% of Western European males that were oldest when they were first married were older than what age? Give the z-score needed to calculate the result. 80% of Western European males were first married after they were old. years

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