Answer:
j=42.36
Step-by-step explanation:
=15 to original answer
Answer:
Step-by-step explanation:
c. 0.875
140,000,000x0.25=35,000,000
35,000,000/40,000,000=0.875
I think the answer is true.
Answer: 90% of people getting married for the first time get married before age of 31.13.
Step-by-step explanation:
Given : The average age (
) for a person getting married for the first time is 26 years (U.S. News and World Report, June 6, 1994).
We assume that the ages for first marriages have a normal distribution with a standard deviation (
) of 4 years.
Let x be the age before that 90% of people getting married for the first time get married.
From z-table , the value corresponds to p-value of 0.90 is 1.28155.
Formula : 

Hence, 90% of people getting married for the first time get married before age of 31.13.