95.44% IQ scores are between 77 and 125
We're given,
Mean (a)=101
standard deviation (b)=12
To find : ![P[77 < x < 125]](https://tex.z-dn.net/?f=P%5B77%20%3C%20x%20%3C%20125%5D)
Using Empirical Rule:
∴ 
![P[\frac{77-101}{12} < \frac{x-a}{b} < \frac{125-101}{12}]\\](https://tex.z-dn.net/?f=P%5B%5Cfrac%7B77-101%7D%7B12%7D%20%3C%20%5Cfrac%7Bx-a%7D%7Bb%7D%20%3C%20%5Cfrac%7B125-101%7D%7B12%7D%5D%5C%5C)
![=P[-2 < z < 2]\\](https://tex.z-dn.net/?f=%3DP%5B-2%20%3C%20z%20%3C%202%5D%5C%5C)
![=P[Z < 2]-P[Z < -2]\\](https://tex.z-dn.net/?f=%3DP%5BZ%20%3C%202%5D-P%5BZ%20%3C%20-2%5D%5C%5C)
=95.44% (approx)
Learn more about Empirical rule of IQ calculation here:
brainly.com/question/13077017
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The statement about ADHD that is true is: "ADHD has no clear physical symptoms that can be detected via an x-ray or blood test"
<h3>What is ADHD?</h3>
This is an acronym for a kind of mental disorder that is called Attention Deficit Hyperactivity Disorder (ADHD).
Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental psychiatric condition.
It is characterized by challenges concentration, excessive activity, or difficulty restraining behavior that is inappropriate for a man's age.
Learn more about ADHD at;
brainly.com/question/10002219
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Answer:
Villa of Green Happiness.
Explanation:
