I took the quiz, the answer is: They must be obtained through diet.
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Answer: (a) 0.927
(b) 14.2%
Explanation:
Given : According to the National Health Survey, the heights of adult males in the United States are normally distributed .
Mean :
Standard deviation :
Let X be a random variable that represents the heights of adult males in the United States .
Z-score :
(a) For x= 64
For x= 74
Using the standard normal distribution table , we have
The deviation 2.8 inches. (a) What is the probability that an adult male chosen at random is between 64 and 74 inches tall :-
Hence, the probability that an adult male chosen at random is between 64 and 74 inches tall = 0.927
b) Since 1 feet = 12 inches
Then , 6 feet =
The z-score corresponds to x=72 :
Then , the probability that the adult male population is more than 6 feet tall :-
Hence, the percentage of the adult male population is more than 6 feet tall = 14.2%
With parental consent you can be any age. Without parental consent it is usually 18, in some places it’s 16. Note that it’s ultimately up to the piercer if they are comfortable piercing you at a young age.