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
#SPJ10
Answer: Its C - For example, it takes years—not days—of practice to become a talented pianist.
Explanation:
Its on edge :) Your welcome
Some of the things I would do after winning a $500 prize would be:
- If I won the prize, I would travel to the beach to take a break.
- If I won the prize, I would buy a bike for fun.
- If I won the award, I would invite my wife to dinner at a restaurant.
- If I won the prize, I would give my father a new car.
- If I won the prize, I would donate a part to animal care foundations.
<h3>What is a conditional?</h3>
Conditional sentences are a type of sentence that is characterized by having a verb conjugated in the conditional. This verb tense is used to express:
- Probabilities
- Proposals
- Doubts
- Wishes
To write a sentence in the conditional tense, we must specify what event must happen and the immediate cause or the action that we would do after that condition occurs.
Some examples of conditional sentences with the context of the award obtained for the study of biodiversity in Peru would be:
- If I won the prize, I would travel to the beach to take a break.
- If I won the prize, I would buy a bike for fun.
- If I won the award, I would invite my wife to dinner at a restaurant.
- If I won the prize, I would give my father a new car.
- If I won the prize, I would donate a part to animal care foundations.
Learn more about conditionals in: brainly.com/question/5178817
Answer:
9/22 or 40.9%
Explanation:
Probability describes the likelihood of an event. To find simple probability, like in this question, use division.
To find the probability of the first question being a free response, you first need to find the total number of questions. This can be done by adding together all of the given information. There are 10 multiple choice, 3 essays, and 9 free responses.
This means that there are 22 total questions. Next, find how many of these questions are free-response. We know that there are 9 free responses and 22 questions in total. So, 9 out of 22 are free responses. This can be rewritten as 9/22.
If you want to find the percentage, simplify the fraction and convert it to a percentage.
Then, move the decimal 2 places to the right. This gives you 40.9%, which is the probability of the first question being a free-response.
